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INFN-Commissione III July 2013
PRISMA-FIDES
”Heavy-ion reactions from grazing collisions to complete fusion”F.I.D.E.S. - Few Interesting Developments Expecting SPES
(Progress Report July 2012 - June 2013, perspectives for 2014)
G.Montagnoli, M.Mazzocco, C.Michelagnoli, D. Montanari, C.Parascandolo, F.Scarlassara, E.Strano, D.TorresiDipartimento di Fisica e Astronomia, Universita di Padova, and Istituto Nazionale di Fisica Nucleare
Sezione di Padova, I-35131, Padova (Italy)
A.M.Stefanini, L.Corradi, E.Fioretto, H.JiaIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro
I-35020 Legnaro (Padova, Italy)
G.PollaroloDipartimento di Fisica, Universita di Torino and INFN, Sez. di Torino, Torino (Italy)
S.Szilner, T.MijatovicRuder Boskovic Institute, HR-10 002 Zagreb, Croatia
S.Courtin, F.Haas, A.GoasduffIPHC, CNRS-IN2P3, Universite de Strasbourg, F-67037 Strasbourg Cedex 2, France
D.AckermannGSI Helmholtzzentrum fur SchwerionenforschungGmbH,Planckstr.1,D-64291 Darmstadt, Germany
J.GreboszThe Henryk Niewodniczanski Institute of Nuclear Physics (IFJ PAN), Krakow, Poland
R.N.Sagaidak, N.KondratievFlerov Laboratory of Nuclear Reactions, JINR, Dubna, Russia
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Contents
I. Present status of the experiments and plans for 2014 4
II. Recent measurements and developments 5A. Oscillations in the fusion excitation function of 28Si + 28Si above the barrier 5B. Sub-barrier fusion of the 28Si+28Si system 5C. Effects of transfer channels on near- and sub-barrier fusion of 32S+48Ca 6D. Exploring the influence of transfer channels on fusion reactions: the case of 40Ca+58,64Ni 7E. Fusion of 40Ca+96Zr revisited 7F. Probing n− n, n− p and p− p correlations in sub-barrier transfer reaction of 92Mo+54Fe 8G. Neutron-rich nuclei populated via transfer reaction in the 197Au+130Te system 9H. Test fusion measurements with the EXOTIC set-up 10I. The second arm of PRISMA 11J. A new scattering chamber for astrophysical reaction studies 13
III. Experimental proposals for the near future 14A. Fusion hindrance and quadrupole collectivity in collisions of A'50 nuclei 14B. Study of fusion hindrance for 24Mg + 30Si at extreme low energies 14C. Test measurement of low-energy fusion of 16O + 30Si 15D. Ra nuclei production cross sections in the 12C+204,206,208Pb reactions 15E. Revealing the structure of carbon nuclei A = 10 - 14 through measurements of the excited
state decay properties 15F. A further test for fusion studies with the Exotic set-up 16G. In-beam tests of a high resolution detection system for kinematic coincidence measurements in
conjunction with PRISMA 16
IV. Publications July 2012 - June 2013 17
V. Details on the new experiment 19A. Our collaboration 19B. Fund requirements 19C. Milestones 21
1. Recent milestones 2013 212. Proposed milestones for 2014 22
References 22
VI. Appendix: quotations 23
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I. PRESENT STATUS OF THE EXPERIMENTS AND PLANS FOR 2014
This report is dedicated to the main results of the PRISMA-FIDES experiment in the period July 2012- June 2013 and to the scheduled activity for next year July 2013 - December 2014. The experimentPRISMA-FIDES comprises two lines of research: 1) the study of binary reactions using the heavy-ionmagnetic spectrometer PRISMA [1], and 2) the investigation of fusion reactions using the PISOLO set-up, based on a beam electrostatic deflector. Both devices are installed in the target halls of the XTUTandem-ALPI-PIAVE accelerator complex, and exploit their high-quality heavy-ion beams. The programfor the next years 2015-16 has not changed sofar.
In the past year, the scientific and technological programs have proceeded along the lines illustratedin Sept. 2012 without significant problems or delays. We have used PRISMA for two long experimentsduring Spring 2013. The first one has been the study of grazing reactions in the system 92Mo +54Fe(using the inverted kinematics) at sub-barrier energies. In the second one, the very heavy beam 197Auhas been accelerated up to 1300 MeV by PIAVE-ALPI on the target 130Te. The analysis of the previousdata on sub-barrier transfer in 60Ni +118Sn is almost complete, and a paper is being prepared.
The Pisolo set-up has been used for a complete study of the fusion in the system 28Si + 28Si, down tothe sub-barrier region (1µb of cross section) and above the barrier where interesting oscillating structureshave been observed. The data analyses for 32S + 48Ca and 60Ni + 100Mo (taken at Argonne) have beencompleted, and two papers published. The fusion excitation function of 40Ca + 96Zr has been extendedby two orders of magnitude to far sub-barrier energies, and fusion barrier distributions have been fullymeasured for the two systems 40Ca + 58,64Ni (experiment proposed by Strasbourg collaborators). Allthese measurements deal with the dynamics of heavy-ion reactions near the barrier, and will be continuedin 2014 (the abstracts of the submitted proposals are reported later in this Report).
Several technical developments have been achieved and others are in progress:- The installation of the sliding seal scattering chamber for PRISMA will be completed in October.- The detectors for the second arm of PRISMA have been constructed (an axial ionization chamber
(Bragg chamber) with a PPAC in front of it, a position-sensitive micro-channel plate detector), and theyhave been tested with an α-source. Final in-beam tests are scheduled for the next semester. Followingthis, the second arm will be installed at the PRISMA target position in the first half of 2014.
- The new data acquisition system and on/off-line analysis software, already developed and installedat PISOLO, is now operational also for PRISMA.
- A first test experiment has been performed in collaboration with the EXOTIC group for the mea-surement of fusion cross sections using stable beam with that set-up. This was rather succesfull andencouraging. Further tests will be scheduled with an improved detector system.
- A better ion tracking will be achieved for the ions analyzed by PRISMA, by implementing a secondY read-out at the focal plane (in the ionization chamber).
This report is signed by all people contributing to experiments and developments, even if not formallyparticipating in PRISMA-FIDES.
FIG. 1: The control display of the Tandem XTU, showing the terminal voltage 15.3 MV on March 26, 2013.
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II. RECENT MEASUREMENTS AND DEVELOPMENTS
A. Oscillations in the fusion excitation function of 28Si + 28Si above the barrier
The fusion excitation functions of light heavy-ion systems like 12C,16O + 12C,16O show oscillatorystructures above the Coulomb barrier, sometimes caused by resonances. They may also be due to thepenetration of successive centrifugal barriers well separated in energy. Those structures are best revealedby plotting the derivative of the excitation function [2]. CC calculations based on a shallow potentialin the entrance channel reproduce nicely the oscillations. This implies some consistency with fusionhindrance at far sub-barrier energies, because the ion-ion potential directly influences both effects.
In heavier systems, the amplitude of oscillations decreases and the peaks get nearer to each other.This makes the measurements very challenging. We have performed a first experiment for 28Si + 28Si,by measuring fusion cross sections in an energy range of '15 MeV above the barrier, with 0.5 MeVlab-energy steps. Previous data marginally suggest the presence of oscillations in this system [3]. Thebeam was accelerated by the XTU Tandem of the LNL onto 50 µg/cm2 targets, and fusion-evaporationresidues were detected near 0o. Preliminary results are shown in the figure.
It is remarkable to note that three regular oscillations are clearly observed. The predicted oscillatorystructure of Ref. [2] (full line in the figure) is in good agreement with the observations. The final result ofthe experiment, together with our recent data down to far sub-barrier energies, will be analyzed withinthe CC model, and will provide a stringent test for the calculations, in particular for the choice of theion-ion potential, and for the possible relation of the observed structures with resonances.
250
300
350
400
450
500
550
600
64 66 68 70 72 74 76 78 80
σ (
rel.
units
)
Elab
(MeV)
28Si + 28Si
8
12
16
20
24
28
32
36
40
64 66 68 70 72 74 76 78 80
Esbensen
d(Eσ
)/dE
(a.
u.)
Elab
(MeV)
FIG. 2: (left) Fusion cross sections of 28Si + 28Si; statistical uncertainties are close to 1% for all points. (right)Energy-weighted derivative of the excitation function, compared to the prediction of Ref. [2].
B. Sub-barrier fusion of the 28Si+28Si system
Fusion reactions in the region near and below the Coulomb barrier have been widely investigated in recent yearsespecially in the medium mass region [4, 5]. In particular, it has been observed that for some systems at energiesfar below the barrier the cross section rapidly falls with respect to the theoretical predictions obtained by standardcoupled-channel calculations (fusion hindrance). This is appropriately shown by means of the astrophysical S-factor which develops a maximum as a function of the energy when hindrance sets up. This maximum is requiredwhen the Q-value for fusion is Qfus<0, while it is not needed when Qfus>0 [6]. Heavy-ions fusion reactions withpositive Q-values play an important role both in the evolution of massive stars (C- and O-burning stages) andin the evolution of the inner crust of accreting neutron stars, where exotic reactions take place (i.e. 24O+24O,28Ne+28Ne, 34Ne+34Ne). Consequently, it is very important to measure the detailed low-energy behaviour forsimilar medium-light systems with Qfus>0, because this may help in the extrapolation of the low-energy cross-sections for those of astrophysical interest.We will present in this contribution very recent data for the fusion reaction in the 28Si+28Si system (Qfus=+10.9MeV). The experiment has been performed at the XTU Tandem of LNL, using a 28Si beam at bombardingenergies ranging from above to well below the Coulomb barrier. Evaporation residues have been detected by theelectrostatic separator set-up near 0. The behaviour of the excitation function for this system and its comparisonwith theoritcal calculations will be discussed.
6
10-4
10-3
10-2
10-1
100
101
102
25 30 35
(2+)2
no coupling
σfu
s (m
b)
Ecm (MeV)
FIG. 3: Measured fusion excitation function of 28Si+28Si, compared to CC calculations including the 2+ state upto the two-phonon level.
C. Effects of transfer channels on near- and sub-barrier fusion of 32S+48Ca
The fusion excitation function of 32S + 48Ca has been experimentally studied in a wide energy range, fromabove the Coulomb barrier down to cross sections in the sub-µb region [7]. The fusion cross section decreasessmoothly below the barrier, and the logarithmic slope increases slowly and remains well below the constant Sfactor limit LCS : no evident hindrance character shows up in the measured energy region (see Fig.8, panels (a) and(b)). The excitation function for the near-by system 36S+48Ca [8] is much steeper. Those data and the presentones for 32S+48Ca have been analyzed by CC calculations that are based on the M3Y+repulsion, double-foldingpotential. While the fusion of 36S+48Ca can be reproduced very well by considering couplings to low-lying statesin projectile and target, to explain the data for 32S+48Ca it is necessary to consider explicitly the coupling topair transfer channels with positive Q-values. The barrier distribution extracted from the 32S+48Ca excitationfunction has a peculiar shape (panel (c)) with two main peaks that the calculations are not able to reproducein detail. The transfer couplings reduce significantly the disagreement with the data even if the double-peakstructure of the barrier distribution remains unexplained.
10-4
10-3
10-2
10-1
100
101
102
103
35 40 45 50
32S+48Ca2+,3-
2+,3-+transf
36S+48Ca2+,3-
σf(m
b)
Ec.m.
(MeV)
(a)
0
1
2
3
4
5
30 35 40 45 50 55
no coupl.2+,3-
2+,3-+transf.
L(E c.
m.) (
MeV
-1)
Ec.m.
(MeV)
32S + 48Ca
LCS
(b)
0
0.1
0.2
0.3
0.4
36 40 44 48 52
no coupl.2+,3-
2+,3-+transf.
BD (M
eV-1
)
Ec.m.
(MeV)
32S + 48Ca(c)
FIG. 4: (a) Experimental fusion cross sections are compared to CC calculations based on the M3Y+repulsionpotential. (b) Logarithmic derivative L(E) of the (energy-weighted) cross section; the LCS value is also indicated.(c) Barrier distribution compared with CC calculations.
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D. Exploring the influence of transfer channels on fusion reactions: the case of 40Ca+58,64Ni
Fusion-evaporation is the dominant reaction mechanism in medium-light heavy-ion collisions at relatively lowbombarding energies. The dominant features observed at these energies, are the enhancement of the fusioncross-section at the Coulomb barrier (CB) and at moderate subbarrier energies, and the hindrance of the cross-section at deep subbarrier energies. Fusion cross-sections around the CB have been discussed extensively to bedriven by couplings of the relative motion of the colliding nuclei to their low energy surface vibrations and/orstable deformations. The corresponding coupled-channel calculations of the distributions of barriers and theirextraction from precise cross-section measurements have revealed to be a powerful tool to better understand therole of couplings to collective degrees of freedom of the target and projectile [9].
This contribution reports on a recent study of the fusion process in the Ca+Ni systems. This work has beentriggered by outstanding results obtained recently in the Ca+Ca [4]( and references therein) systems, and alsoby the pioneering studies of the Ni+Ni systems [10]. Previous fusion measurements of the symmetric 40Ca+40Caand 48Ca+48Ca and of the asymmetric 40Ca+48Ca systems have been performed at the LNL down to very lowsubbarrier energies. All Ca+Ca systems have shown large fusion hindrance at deep subbarrier energies [4]. Forthe asymmetric system, 40Ca+48Ca, hindrance effects show up at lower energies than in the other systems and ithas been concluded that it is necessary to take into account the positive Q value transfer channels to reproducethe fusion cross-section below CB. In a similar way, effects on the fusion excitation function attributed to transferchannels have been invoked in a pioneering study of the fusion excitation function of the 58Ni+64Ni system byBeckerman et al. [10].
Based on these two observations, we have decided to perform accurate cross-section measurements in the cross-systems Ca+Ni to identify possible effects of the neutron excess on fusion, in the distribution of barriers energyrange. Experimental data have been taken at LNL for the 40Ca+58,64Ni systems taking advantage of the LNLelectrostatic deflector in its upgraded version, making use of large size micro-channel plate and silicon detectors.We have thus been able to extend to much lower energies previous 40Ca+58Ni [11] data and to measure for the firsttime a fusion excitation function for the 40Ca+64Ni system. The corresponding cross-sections and distributionsof barriers extracted from accurate data will be presented. State-of-the-art coupled-channel calculations will bepresented to discuss the subbarrier fusion excitation function behavior in terms of the influence of neutron transferchannels in the 40Ca+64Ni system.
E. Fusion of 40Ca+96Zr revisited
The fusion excitation function of 40Ca+96Zr was measured by our group several years ago [12], with the aimof extracting the fusion barrier distribution from the data. We found that the cross section decreases very slowlybelow the barrier, in comparison with other Ca + Zr systems. Consequently, the logarithmic slope is very small,and the barrier distribution extends with a long tail down to the lowest measured energies. In fact, couplingsto neutron transfer channels with positive Q-values produce visible effects in the sub-barrier energy range. Thelowest measured cross section was however too high (0.16 mb) to study the effect of nucleon transfer couplings inthe deep sub-barrier energy range where fusion hindrance is expected to appear. With the aim to clarify if theinfluence of transfer channels on excitation function overcomes fusion hindrance [13], we have recently extendedthe measurement of fusion cross sections for 40Ca+96Zr to lower energies.
10-3
10-2
10-1
100
101
102
103
85 90 95 100 105 110
mf (
mb)
Ecm (MeV)
40Ca + 96Zr
Nouveau2N
Ch-16Ch-23Ch-69
FIG. 5: (left) Fusion cross sections for 40Ca+96Zr. The lines are the results of the CC calculations. (right)Logarithmic derivative of the fusion excitation function.
The fusion cross section has been measured down to 2.5µb and the data are analyzed by CC calculations usingthe Akyz-Winther (AW) potential. In the calculations the nuclear structure of the two colliding nuclei has been
8
taken into account by including multi-phonon excitations of 2+ and 3− states (see Ch-23 in Fig.5 (left)), howeverthere is a clear need for transfer coupling at energies below 93 MeV. The effective Q-values for 1n, 2n, 1p, 2ptransfer channels are all positive, and the CC treatment of transfer is in general a complex problem because thereare many channels that have to be considered. We include one-nucleon transfer coupling following the method thatwas developed in Ref. [14], while two-nucleon transfer channels were simulated in the calculations by one effectivepair-transfer channel with an effective Q-value = +1 MeV and using the macroscopic form factor proposed byDasso and Pollarolo [15]. The calculation has a total of 69 channels (see Ch-69 in Fig.5 (left)) and gives a goodfit to the data above 90 MeV. The logarithmic slope of the excitation function defined as: L(E)=(dln(Eσ))/dE isplotted in Fig.5 (right) where it increases slowly at lower energies and remains very low with respect to the limitexpected for a constant astrophysical S factor (Constant S) which is generally reached when the fusion hindrancephenomenon takes place.
We conclude that a continuing strong influence of transfer channels is present and there is no evidence of fusionhindrance down to a few µbarn.
F. Probing n− n, n− p and p− p correlations in sub-barrier transfer reaction of 92Mo+54Fe
Two-nucleon transfer reactions play a key role in investigating correlations between nucleons in nuclei. Withheavy ion reactions multiple transfer of nucleons become available, giving the possibility to compare the relativerole of single particle and pair transfer modes [16]. Below the Coulomb barrier, nucleons are transferred ina restricted excitation energy window and, at large internuclear distances, the interacting nuclei are slightlyinfluenced by the nuclear potential. These condition allow to diminish the complexity of theoretical calculationsand thus to extract more quantitative information on pair correlations [17, 18]. Making use of inverse kinematics,target recoils have been detected in multinucleon transfer reactions for the systems 96Zr+40Ca [19] and 116Sn+60Ni[20]. In both cases an excitation function at several bombarding energies has been obtained from the Coulombbarrier to 20-25% below, reaching about 15.5 fm of distance of closest approach. In the 96Zr+40Ca systemcomparison between data and microscopic calculations show the importance played by transitions to 0+ excitedstates and of states with high multipolarity and non natural parity [19]. In this superfluid system the groundstate (g.s.) Q-values for the neutron transfer channels are close to their optimum Q-values, Q+1n
gs = -1.7 MeVand Q+1n
gs = +1.3 MeV. For this reason the population of those two transfer channels should concentrate on anenergy region close to the g.s.→g.s. transition. Data are being analyzed for both neutron and proton transferchannels. It will be interesting to see how calculations including only transfer of J = 0+ pairs to the 0+
gs statescompare with the experimental data. The comparison between data and theory for these two cases, namely nucleinear closed shells and nuclei of super-fluid character, will significantly improve our understanding of the originof the enhancement factors. In this context, it is also important to investigate the role played by neutron-protoncorrelations. These correlations are presently attracting peculiar interest in the field, especially making use ofradioactive ion beams. Nuclear models point out that such a correlation is expected to be strongest in N ∼ Znuclei, where protons and neutrons occupy the same orbitals [21, 22]. As known, multinucleon transfer reactionsallow the transfer of large number of nucleons, and the strength of each of these channels is governed by formfactors and optimum Q-value consideration. In order to study proton-neutron correlation one has to use systemswhere the population of the (np) channels is allowed by the Q-value. Calculations performed with the codeGRAZING [23] for the 92Mo+54Fe system at an energy close to the Coulomb barrier are shown in Fig. 6(left) .One sees a rather symmetric distribution of the transfer strength, both toward the proton and neutron strippingand pick-up channels. In particular one sees the significant population of the (np) channel.
We measured an excitation function for the most intense transfer channels in the 92Mo+54Fe system. Byemploying inverse kinematics and by detecting ions at very forward angles, we have, at the same time, enoughkinetic energy of the outgoing recoils (for energy and therefore mass resolution) and forward focused angulardistribution (high efficiency). The 92Mo beam was delivered by the the ALPI super-conducting booster of LNLwith average currents of ∼ 2 pnA, onto a 100 µg/cm2 54Fe target on a C-backing of 15 µg/cm2 of thickness.Fe-like recoils have been be detected by PRISMA at θlab=20, corresponding to θc.m. = 140. The bombardingenergy of ALPI was varied in steps of 20 MeV from 400 to 285 MeV and three energy points have been measuredin the range Elab = 200-250 MeV, with the Tandem only.Two Si detectors, used as monitors, have been placed inside the reaction chamber at a distance of '35 cmfrom the target to detect Rutherford scatterd 54Fe and 12C ions. Their spectra will be used to get an absolutenormalization of cross sections and to check the kinematical conditions of the beam. Furthermore, using the threepoints measured with Tandem only we can minimize the accuracy on the energy of the beam released by ALPIbelow 1% of uncertainty.Ions have been identified in atomic number Z through a two dimensional matrix of the energy loss inside theionization chamber, ∆E, versus the total energy released, E. The identification in mass has been obtained byreconstructing the trajectories of the ions inside the spectrometer on an event-by-event basis making use of thepositional information at the entrance and at the focal plane of the spectrometer [24]. The time-of-flight of theions has been used to get the kinetic energies of the recoil and subsequently the Q-value of the reaction. A
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FIG. 6: (left) Total cross section in the ∆N (number of transferred neutrons) vs. ∆Z (number of transferredprotons) matrix calculated with the code GRAZING for the same reaction at an energy close to the Coulombbarrier. Positive and negative numbers correspond to pick-up and stripping channels, respectively. (right) Exampleof a two dimensional spectra showing the mass, A, in coincidence with the position on the focal plane, xfp, forFe-like isotopes.
preliminary example of the obtained mass resolution is shown in Fig. 6 (right) where the mass is plotted againstthe position on the focal plane. The resolution is good and the different neutron transfer channels for the Feisotopic chain are clearly distinguishable.The same procedure has been adopted for isotopic chains of different Z and transfer probabilities, defined as theratio of the transfer yield over the elastic, have been extracted for the most intense channels. Data are beinganalyzed and preliminary results show that the statistics is high enough to study proton transfer channels belowthe Coulomb barrier.
G. Neutron-rich nuclei populated via transfer reaction in the 197Au+130Te system
In the proposal of Sept. 2012 one of the scheduled experiments was the measurement of transferreactions in 48Ca + 48Ca, that was also the object of a milestone for 2013. We have found muchmore interesting the investigation of the very heavy system 197Au+130Te, so that this was proposedto the PAC and approved with very high marks. The beam time was performed in April 2013,and preliminary results are described here below. We propose that this has completely replacedthat milestone.
Transfer reactions play a very important role for the definition of the reaction mechanism that describes theevolution from the quasi-elastic to the more complex deep-inelastic regime. For this reason in recent years heavy-ion transfer reactions have been used to populate neutron-rich nuclei in the low-medium mass region, providinginformation on reaction mechanisms and on nuclear structure.On the other side still poorly explored is the neutron rich region close to A'130, i.e. around 132Sn, where thedetermination of transfer cross sections would provide important inputs on the r-process, which plays a criticalrole in the nucleosynthesis of the heaviest elements [25] and in other astrophysical scenarios [26, 27]. Multinucleontransfer reactions represent a valuable way to access this mass region, comparable to other reaction mechanismslike fission or fragmentation. For these reasons, heavy partners of transfer reactions are now receiving a particularattention and experiments have been recently performed in this direction, i.e. at GANIL with the study of the136Xe+198Pt reaction [28] and in Jyvaskyla for the 136Xe+208Pb and 136Xe+natOs systems [29].Within this context, we measured in inverse kinematics both light and heavy transfer products for the 197Au+130Tesystem using the PRISMA magnetic spectrometer. One aim was to measure experimental yields of light reactionproducts and compare them to theoretical calculations [23] already successfully applied to lower mass systems,since secondary processes like evaporation may play an important role in the final mass distributions for theserather heavy ions. Furthermore, since with neutron-rich projectile also proton stripping and neutron pick-upchannels become available, it is interesting to compare the experimental yields for the light and heavy partnersof the reaction, where evaporation and fission may shift the distribution to lower mass values. In Fig. 7 (left)we show theoretical calculations done with the semi-classical model GRAZING [23] for projectile- and target-likereaction products. It has to be noticed that proton stripping and neutron pick-up channels open up and that thepredicted cross section for 132Sn turns out to be around 30 µb, reachable within the efficiency limit of PRISMA.
The 197Au beam was delivered, at the bombarding energy Elab=1070 MeV, by the PIAVE-ALPI accelerator
10
FIG. 7: (left) GRAZING code calculations for total cross sections of multineutron and multiproton transfer chan-nels populated in the 197Au+130Te reaction at Elab=1070 MeV. (right) Two dimensional matrix showing the A/qvs xfp for Te-like ions at Elab=1070 MeV. The ridges correspond to the masses for different charge states.
systems with an average current of '1.5 pnA onto a 100 µg/cm2 thick 130Te target between two C-backing layersof 20 µg/cm2 and 10 µg/cm2 of thickness. The beam energy has been chosen in order to get at the same time ahigh enough primary cross section and a relative low excitation energy.PRISMA has been set at two different angular positions, θlab=37 and θlab=27, to maximise the detection ofthe quasi-elastic and the deep-inelastic components, respectively. We remind that the angular acceptance of thespectrometer is ±5 with respect to the central angle so that almost the whole transfer flux has been detected.In inverse kinematics both of the binary partners have enough kinetic energy at forward angles to get a goodresolution for the identification of reaction products in mass and atomic number. For this reason this techniquehas already been successfully used in recent experiments involving 96Zr+40Ca [19] and 116Sn+60Ni [20] systems.Masses have been identified on the basis of an event-by-event reconstruction of the ion trajectories inside themagnetic elements, using the positional information at the entrance and at the exit of the spectrometer[30, 31]while the information given by the time-of-flight has been used to reconstruct the kinetic energy of the ions andthe reaction Q-value. Target-like recoils had kinetic energies of the order of 5 MeV/A at the (near grazing) angleθlab = 37, which ensured a very good A and Z separation, which would not be achievable in direct kinematics.The good mass resolution is shown in Fig. 7 (right), where the correlation matrix between the position on thefocal plane and the value of the A/q (ratio of the mass over the atomic charge state) is shown.The energy of the beam-like particles was ∼ 2.5 MeV/A at the same detection angle. Since this angle correspondsto the kinematically correlated one on opposite side with respect to the beam direction, we could directly compareyields of light and heavy reaction products (the two detected ions have the same primary cross sections). In thiscase the kinetic energy was sufficient to get mass identification, while Z resolution was limited to 2-3 units.PRISMA was set at two different magnetic fields (differing by ∼ 15-20%) in order to detect with maximum yieldTe-like and Au-like ions. We would like to point out that at the most forward angle θlab=27 Au-like particleshave kinetic energies of ∼ 800 MeV. With this kinetic energy we had the opportunity to test for the first timethe detector performance of PRISMA with large masses (actually with the highest mass beam presently availableat LNL), a test which is important for future studies and developments. Finally we want to mention that thecontribution of transfer induced fission was studied by increasing the bombarding energy Elab=1300 MeV, bymodifying the pressure of the gas inside the ionization chamber and by setting proper magnetic fields in order tomaximise the detection of fission fragments. Fission events have then been identified in the ∆E − E matrix anddata are under analysis.
H. Test fusion measurements with the EXOTIC set-up
The first test to explore the capabilities of the beam-line EXOTIC as a separator for heavy-ion fusion-evaporation residues (ER) using stable beams, was recently performed in the period May 24-26, and showedthe feasibility of this kind of experiments. The chosen reaction was 84 MeV 32S + 48Ca where the fusion crosssection (already known from previous work) is 344 mb.
Primary beam rejection factors as high as 1010-1011 have been achieved and the figure below shows a typical E-ToF 2D-plot, where one can appreciate two well separated regions corresponding to the scattered beam and to theER. The ion-optical calculations for all the EXOTIC electromagnetic devices (performed with the code GICOSY)turned out to be in good agreement (within 5-10%) with the actual electric and magnetic fields providing thehighest transmission through the beam-line. Moreover, the scaling of the fields with the ER magnetic rigiditywas also successfully tested, since one run was performed with a 64Ni target (and a factor 100 smaller fusion cross
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section, as we are below the barrier for the system 32S + 64Ni at that energy). Also in this case, the ER wereimmediately detected, without any additional tuning of the ion-optical elements. Only the transmission (overallabsolute efficiency for detecting ER) turned out to be at least an order of magnitude smaller than expected.Several items could contribute to lower the transmission. First of all the misalignment between the primarybeam with respect to EXOTIC optical axis. The primary beam was certainly entering the spectrometer verticallytilted, since higher transmission values were obtained with the 1-m long Wien filter (whose dispersive directionis along the vertical axis) turned on. We shall check the optical alignment of the beam line section going fromthe switching magnet to the first half of the EXOTIC separator (before the 30o bending magnet) and we planto investigate the possibility to realign the primary beam to the EXOTIC optical axis by means of two verticalsteerers located between the first quadrupole triplet and the bending magnet. This feature was not tested duringthe last test due to lack of time.
The actual transmission through EXOTIC and its scaling with respect to ion-optical calculation are crucialpieces of information for planning future fusion-evaporation studies far below the barrier and more reliable esti-mations of the beam-time are needed.
We point out that 32S could only be focused to the target in the evening of the first day of the recent beamtime, due to vacuum problems in the switching magnet. Subsequently, the focusing procedure had to be repeatedthree times (several hours needed each time), before obtaining a good working condition. Overall, almost half ofthe scheduled time was lost due to these problems.
TOF (chann
els)
Energy (channels)
32S+48Ca E=84MeV 344mb only Mag.Dipole on
Mag.Dipole & Wien Filter on
32S+64Ni E=84MeV 3.2mb Mag.Dipole & Wien Filter on
FIG. 8: On-line E-ToF matrices obtained in the recent test with EXOTIC.
I. The second arm of PRISMA
Besides the light partner products, the heavy partners are presently receiving peculiar attention in transferreactions. For their identification a high resolution detection system has been assembled to be coupled to the thelarge acceptance spectrometer PRISMA and to perform kinematic coincidence measurements. The new detectionsystem has been built during last year partially starting from existing detector parts used in the past for lightion reactions. It is mainly composed of a position sensitive PPAC followed by an axial ionization chamber. Theinner parts of such detectors have been completely renewed and properly reassembled. The PPAC provides atiming signal for Time of Flight measurements, X and Y positions while the Bragg chamber provides atomic
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number Z and total energy E of the fragment. The latter allows to perform a spectroscopy of the Bragg curvethat, as known, can provide many details about the nature of the particle. In particular, its range in the activevolume can be measured from the length of the Bragg curve, the initial energy of the particle before entering thestopping medium can be obtained by integrating the area under the curve and the atomic number of the particlecan be extracted from the height of Bragg peak (BP) which corresponds to the maximum of the specific energyloss. The enhancement of the BP at the end of the path of the particle ranges from about 3 for the ”light” ionsdown to about 1.5 for the ”heavy” ones. This Bragg Curve Spectroscopy (BCS) has first been proposed andtested by C. Gruhn [32].The PPAC consists of two anode planes (10 µm diameter and 1 mm spacing) and an aluminized mylar foil (1.5µm thick and 20 µg/cm2 Al on both sides) acting as cathode. The distance cathode-anodes is 2 mm. Thedetector has an active area of 10 × 10 cm2 and the 10 cm diameter window is composed of a 1.5 µm thick mylarfoil. The PPAC is operated with isobutane (C4H10) and the X and Y positions are obtained by means of thedelay-line readout. The Bragg chamber has 32 cm active depth with a Frisch grid (FG) to anode distance of 2cm (figure 9). The voltages for the 114 guard rings between the cathode and the FG are reduced by means ofvoltage dividers made of 10 MΩ resistors. The anode and the FG are supplied from two separate HV modulesthrough RC filters in order to eliminate the influence of voltage ripples. The chamber is operated with CF4 andits volume is separated from the PPAC one by means of a 1.5 µm thick mylar foil acting as window.
FIG. 9: Inner side of the axial chamber with the guard rings (left panel). The position sensitive PPAC workingin front of the axial ionization chamber (right panel).
Preliminary bench-tests of the detectors have been performed in laboratory with α particles from a 241Amsource. In these tests the classical method of analog readout of the Bragg chamber was used: a charge sensitivepreamplifier followed by two spectroscopy amplifiers in parallel, each with different shaping times τ . The amplifierwith a short τ (0.5 µs) gives an output signal with an amplitude, which corresponds to the area under the BP.The integration of the charge with a long time constant (4 µs) gives a signal with an amplitude proportional tothe particle energy. An energy resolution of about 1% (Fig.10) and position resolutions of 1 mm in both X andY directions have been obtained (Fig. 11), respectively.
A technique based on the sampling of the ionization density over the particles path with the use of a Flash ADC(FADC) provides the possibility of extracting additional parameters such as particle range R or partial energylosses ∆E. Compared with the classical analogue method the digitalization of the signal of a Bragg chamberoffers several advantages. Indeed, the pile-up rejection and the baseline restoration should reduce the dead timeallowing higher counting rates. Higher dynamic ranges as well as the possibility to use complex algorithms or toimplement complex trigger schemes can improve the detector performance. Finally, the influence of microphoniceffects and other low-frequency noise is largely reduced.
Flash ADCs have been already used with axial chambers [33, 34] but mainly for the identification of ions with Z< 20. Very little work has been done so far to optimize the resolution for heavy ions with higher Z as required bythe next planned experiments to be performed in coincidence with PRISMA. In the previous studies the samplingof the signal with Flash ADCs was performed at a rate of 10-20 MHz (corresponding to a sample width of 100-50
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FIG. 10: Energy and Bragg peak spectra obtained with shaping times of 4 µs and 0.5 µs.
FIG. 11: X and Y position spectra measured with 5.486 MeV α particles.
ns). The recent availability of 12-bit Flash ADCs with higher sampling rates would allow to further improve thesignal processing and therefore to optimize the resolution for heavier ions.
J. A new scattering chamber for astrophysical reaction studies
The Zagreb group has provided a new scattering chamber for studying reactions of astrophysical interest. Thechamber has been recently installed in the West target hall of the Tandem-PIAVE-ALPI complex, and a first testexperiment has been performed.
The main interest deals with carbon-carbon burning (the 12C+12C fusion), which plays an essential role inmany astrophysical phenomena, both quiescent and explosive. Existing data show large discrepancies in theextrapolated S-factors and indicate the presence of low spin resonances in astrophysically relevant energy rangewhich may significantly increase the reaction rate. The reactions 12C + 12C → p + 23Na and 12C + 12C →α + 20Ne are the key reactions for the C-C burning nucleosynthesis. The set-up will be first used to measurethe excitation functions of the 4He + 20Ne resonant scattering and the 4He + 20Ne → 1H + 23Na reaction atastrophysically relevant energies, by use of the 36, 44, 52, and 60 MeV 20Ne beams delivered by the PIAVE-ALPIfacility and a thick 4He gas target which stops the beam. This beam energy range corresponds to the 12C relativeenergy range from the threshold up to 5.4 MeV, which is of prime importance for astrophysics. Light reactionproducts (p,α) will be detected in large area highly segmented silicon strip detector telescopes covering a verylarge angular range in the c.m. system. The array (shown in both panels of the figure below) consists of 5 detectortelescopes built of 20 µm thick ∆E SSSD and 1000 µm thick E DSSSD. Such telescopes make possible detectionand identification of low energy protons and α-particles.
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FIG. 12: Silicon detector telescopes installed in the new scattering chamber for astrophysical studies.
III. EXPERIMENTAL PROPOSALS FOR THE NEAR FUTURE
The abstracts of experimental proposals we have recently submitted to the LNL PAC follow below. They havebeen discussed in the PAC meeting of July 15-16, 2013, for the period October 2013- March 2014. If some ofthem will not be approved due to lack of beam time, they will be most probably re-presented for the followingsemester.
A. Fusion hindrance and quadrupole collectivity in collisions of A'50 nuclei
We propose to measure the fusion excitation function of the system 54Cr + 58Fe from above the barrier to verylow energies, where the phenomenon known as ”fusion hindrance” is expected to show up. No data on the fusionexcitation function of this system exist in the literature sofar. The set-up based on the electrostatic beam deflectorwill be used. The data will be compared, in a first step, to the near-by case 58Ni + 54Fe which clearly showshindrance and a maximum of the astrophysical S-factor. While both 58Ni and 54Fe are closed-shell and rather stiff,54Cr and 58Fe are soft with a quadrupole excitation showing up at similar and rather low-energies. In a secondstep, coupled-channel calculations will be performed for both systems in a consistent way, so to disentangle theconcurring role of hindrance and collective vibrations in determining the fusion cross sections below the barrier.We hope to be able to put in evidence similarities and differences with respect to the behavior of heavier systemslike 60,64Ni + 100Mo, recently studied at Argonne. The experiment will be performed using the high-quality 54CrTandem beam of LNL and the electrostatic beam separator for evaporation residue detection.
B. Study of fusion hindrance for 24Mg + 30Si at extreme low energies
(proposed by C.L.Jiang et al., Argonne National Laboratory)
We propose to measure the fusion excitation function for the system 24Mg + 30Si (Q=17.886 MeV) down tothe 500 nb level, where fusion hindrance should occur. There are only a few measurements of fusion excitationfunctions to low cross sections for positive Q value systems: 28Si + 30Si and 27Al + 45Sc (ANL), and 36S + 48Ca,40Ca + 48Ca and 32S + 48Ca (LNL). Up to now, only a weak evidence for an S-factor maximum has been foundin the system of 40Ca + 48Ca. It is thus still not clear whether for a heavy-ion fusion system with a positiveQ value the hindrance behavior is associated with an S-factor maximum or not. With a new measurement of24Mg + 30Si, together with previous fusion studies at extreme sub-barrier energies, one can obtain an answerto this question. This study is important for assessing the impact of heavy-ion fusion hindrance on reactions ofastrophysical interest, such as in carbon burning, oxygen burning and reactions occurring in the crust of accretingneutron stars. The experiment will be performed using the high-quality 24Mg beam of LNL, a 30Si target fromLNL and the electrostatic beam separator for evaporation residue detection with increased efficiency.
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C. Test measurement of low-energy fusion of 16O + 30Si
We propose to test the feasibility of fusion cross section measurements for 16O + 30Si, at a few energies nearand below the Coulomb barrier. This system is a link between heavier cases like the various S, Ca + Ca isotopecombinations we studied in recent years, and the light heavy-ion systems (e.g. 12C + 12C, 16O + 16O) that areamong the main processes during the carbon and oxygen burning stages of massive stars. The fusion of 16O + 30Siitself is not a relevant process for astrophysics, but it is important to establish the behavior of this system near andmuch below the Coulomb barrier, where couplings to low-lying collective modes and fusion hindrance determinethe cross sections. The low-energy fusion excitation function, whose trend is presently completely unknown, canbe used to perform reliable extrapolations into the astrophysical regime for the relevant C+C and O+O cases.We want to investigate whether hindrance is strong enough to generate a maximum of the S factor vs. energy in16O+ 30Si having a positive Q value for fusion Q = +14.96 MeV, similar to the lighter heavy-ion systems. Toperform the measurement of the full fusion excitation function we have to overcome some experimental difficultiesconnected to 1) the very low energy of the fusion-evaporation residues we want to detect, especially at energieswell below the Coulomb barrier, and 2) the rather low terminal voltage of the Tandem XTU (5.5-6 MV).
D. Ra nuclei production cross sections in the 12C+204,206,208Pb reactions
(proposed by R. Sagaidak et al., Dubna)
We propose to complete our previous study of the 12C+204,206,208Pb reactions, using the LNL electrostaticdeflector (PISOLO) with the aim to obtain reliable cross section data on Ra nuclei production in fusion-evaporationchannels. We intend to carry out a number of different kind of experiments with the aim to improve the reliabilityand to extend the cross section data for the Pb( 12C,xn) reactions. The completion of these measurements allowsus: i) to derive the macroscopic fission barriers for Ra nuclei with neutron numbers 121 N 132 using the standardstatistical model analysis; ii) to use the Ra cross section data and the derived macroscopic fission barriers as areference for the analysis of the fusion probability in less asymmetric Ne+Pt, Ar+Yb, Ca+Er, Fe+Sm and nearlysymmetric Mo+Pd projectile-target combinations leading to the formation of the same and close Ra compoundnuclei. In a general sense the isotopic dependence in fission-barrier heights for nuclei obtained in a wide neutronrange, including the result of the proposed experiments, may also help to improve calculations of the fissionbarriers for exotic neutron-rich nuclei, which in turn may shed light on the astrophysical r-process terminationby fission or fission recycling. In the same way, the reliable cross section data on evaporation residues productionin very asymmetric projectile-target combinations are unconditional references for the empirical determination offusion probabilities in less asymmetric and symmetric colliding systems, that in turn allows a direct comparisonof these values with similar ones obtained in theoretical model calculations.
E. Revealing the structure of carbon nuclei A = 10 - 14 through measurements of the excitedstate decay properties
(proposed by N. Soic et al., Zagreb)
The basic principles of nuclear structure and interaction manifest most clearly in light nuclei due to small numberof important degrees of freedom in these systems. Structure of the lightest element nuclei can be understood in apicture based on α-particle as the main building unit. It emerged that carbon nuclei are key systems to understandthe interplay between boson (α-particle) and fermion degrees of freedom which develop into clustering in someinstances. It is known that carbon isotopes, as well as beryllium isotopes, are deformed, often with well developedclustering. In their neutron-rich isotopes nuclear molecules may form, the systems built from α-clusters andvalence neutrons in the molecular orbitals. Comparison of detailed spectroscopic information for the berylliumand carbon nuclei can provide crucial information for understanding clustering and its evolution with increasingnumber of the clusters. Of particular interest are the 14C and 10C nuclei, both being related to the 10Be, the onlynucleus with experimentally confirmed molecular structure. It is proposed to perform kinematically completemeasurements of the 14N + 10B reactions using a 14N beam of energy 95 MeV from the Tandem, with 14C +10C, 11C + 13C and 12C + 12C in the exit reaction channels. The main objectives are excited states of 10C and14C. Excited carbon nuclei will decay into two, three or four constituents. Measurements of energy and momentaof all except one reaction product makes possible the clear identification of the many-body reaction exit channel,and the full reconstruction of the decay pattern of the excited state. Reaction products will be identified in sixsilicon detector telescopes consisting of 20 µm thick single sided strip detector (16 strips on the front side) as∆E and 1000µm thick double sided strip detector (16 horizontal strips on front side and 16 vertical strips on theback side), each covering angular range of approximately 15o. Information extracted from these measurementsare excitation energy, full width and partial widths of the states and possibly spin and parity.
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F. A further test for fusion studies with the Exotic set-up
The first test to explore the capabilities of the beam-line EXOTIC as a separator for heavy-ion fusion-evaporation residues (ER) using stable beams, was recently performed in the period May 24-26, and showedthe feasibility of this kind of experiments. The chosen reaction was 84 MeV 32S + 48Ca where the fusion crosssection is 344 mb. Primary beam rejection factors as high as 1010-1011 have been obtained. One run was per-formed with a 64Ni target (and a factor 100 smaller fusion cross section, as we are below the barrier for the system32S + 64Ni at that energy). The ER were immediately detected, without any additional tuning of the ion-opticalelements. Only the transmission (overall absolute efficiency for detecting ER) turned out to be at least an orderof magnitude smaller than expected. Several items could contribute to lower the transmission. First of all themisalignment between the primary beam with respect to EXOTIC optical axis. The primary beam was certainlyentering the spectrometer vertically tilted. We shall check the optical alignment of the beam line section goingfrom the switching magnet to the first half of the EXOTIC separator (before the 30o bending magnet) and weplan to investigate the possibility to realign the primary beam to the EXOTIC optical axis by means of twovertical steerers located between the first quadrupole triplet and the bending magnet. This feature was not testedduring the last test due to lack of time. The actual transmission through EXOTIC and its scaling with respect toion-optical calculation are crucial pieces of information for planning future fusion-evaporation studies far belowthe barrier and more reliable estimations of the beam-time are needed.
G. In-beam tests of a high resolution detection system for kinematic coincidence measurementsin conjunction with PRISMA
We propose to perform in-beam tests of a new experimental setup, consisting of a position sensitive ParallelPlate Avalanche Counter (PPAC) followed by an axial chamber. It will allow to perform kinematic coincidencemeasurements in order to extract information on secondary processes affecting the population of final yields of thefragments in multinucleon transfer reaction. Several beams and energies are required to characterize the detectorin different Z and A regions. The high resolution detection system will be tested at the PISOLO target area.After its commissioning it will be installed, during Spring 2014, on the new sliding seal scattering chamber of thelarge acceptance magnetic spectrometer PRISMA.
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IV. PUBLICATIONS JULY 2012 - JUNE 2013
(only refereed papers on international journals)
”Reaction dynamics and nuclear structure of moderately neutron-rich Ne isotopes by heavy-ion reactions”S. Bottoni, G. Benzoni, S. Leoni, D. Montanari, A. Bracco. F. Asaiez, S. Franchoo, I. Stefan, N. Blasi, F. Camera,F.C.L. Crespi, A. Corsi. B. Million, R. Nicolini, E. Vigezzi, O. Wieland, F. Zocca, L.Corradi, G. de Angelis, E.Fioretto, B. Guiot, N. Marginean, D.R. Napoli, R. Orlandi, E. Sahin, A.M. Stefanini, J. J. Valiente-Dobon, S.Aydin, D. Bazzacco, E. Farnea, S. Lenzi, S. Lunardi, P. Mason, D. Mengoni, G. Montagnoli, F. Recchia, C. Ur,F. Scarlassara, A. Gadea, A. Maj, J. Wrzesinski, K. Zuber, Zs. Dombradi, S. Szilner, A. Saltarelli, G. Pollarolo
Phys.Rev.C85(2012)064621
”Structure of the N=50 As,Ge,Ga nuclei”E. Sahin, G. de Angelis, G. Duchene, T. Faul, A. Gadea, A.F. Lisetskiy, D. Ackermann, A. Algora, S. Aydinh,F. Azaiez, D. Bazzacco, G. Benzoni, M. Bostan, T. Byrski, I. Celikovic, R. Chapman, L.Corradi, S. Courtin, D.Curien, U. Datta Pramanik, F. Didierjean, O. Dorvaux, M.N. Erduran, S. Erturk, E. Farnea, E. Fioretto, G. deFrance, S. Franchoo, B. Gall, A. Gottardoa, B. Guiot, F. Haas, F. Ibrahim, E. Ince, A. Khouaja, A. Kusoglu, G.La Rana, M. Labiche, D. Lebhertz, S. Lenzi, S. Leoni, S. Lunardi, P. Mason, D. Mengoni, C. Michelagnoli, V.Modamio, G. Montagnoli, D. Montanari, R. Moro, B. Mouginot, D.R. Napoli, D. ODonnell, J.R.B. Oliveira, J.Ollier, R. Orlandi, G. Pollarolo , F. Recchia, J. Robin, M.-D. Salsac, F. Scarlassara, R.P. Singh, R. Silvestri, J.F.Smith, I. Stefan, A.M. Stefanini, K. Subotic, S. Szilner, D. Toneva, D.A. Torres, M. Trotta, P. Ujic, C. Ur, J.J.Valiente-Dobn, D. Verney, M. Yalcinkaya, P.T. Wady, K.T. Wiedemann, K. Zuber
Nucl.Phys.A893(2012)1
”Toward the N = 40 sub-shell closure in Co isotopes and the new island of inversion”F Recchia, S M Lenzi, S Lunardi, E Farnea, A Gadea, N M?rginean, J J Valiente-Dobn, M Axiotis, S Aydin, DBazzacco, G Benzoni, P G Bizzeti, A M Bizzeti-Sona, A Bracco, D Bucurescu, F Camera, L Corradi, G de Angelis,F Della Vedova, E Fioretto, M Ionescu-Bujor, A Iordachescu, S Leoni, R M?rginean, P Mason, R Menegazzo, DMengoni, B Million, G Montagnoli, D R Napoli, F Nowacki, R Orlandi, G Pollarolo, A Poves, E Sahin, K Sieja,F Scarlassara, R P Singh, A M Stefanini, S Szilner, C A Ur and O Wieland
Phys. Scr. T150 (2012) 014034
”Effects of transfer channels on near- and sub-barrier fusion of 32S+48Ca”G. Montagnoli, A.M. Stefanini, H. Esbensen, C.L. Jiang, L.Corradi, S. Courtin, E. Fioretto, A. Goasduff, J.Grebosz, F. Haas, M. Mazzocco, C. Michelagnoli, T. Mijatovic, D. Montanari, C. Parascandolo, K.E. Rehm, F.Scarlassara, S. Szilner, X.D. Tang, C.A. Ur
Phys.Rev.C87(2013)014611
”Collective nature of low-lying excitations in 70,72,74Zn from lifetime measurements with the AGATA demonstra-tor”C. Louchart, A. Obertelli, A. Gorgen, W. Korten, D. Bazzacco, E. Clement, L.Corradi, G. de Angelis, J.- P.Delaroche, A. Dewald, F. Didierjean, M. Doncel, G. Duchene, M.N. Erduran, E. Farnea, C. Finck, E. Fioretto,C. Fransen, A. Gadea, M. Girod, A. Gottardo, M. Hackstein, T. Huyuk, A. Kusoglu, S. Lenzi, J. Ljungvall, S.Lunardi, D. Mengoni, R. Menegazzo, C. Michelagnoli, O. Moller, G. Montagnoli, D. Montanari, D.R. Napoli, R.Orlandi, G. Pollarolo, A. Prieto, B. Quintana, F. Recchia, W. Rother, E. Sahin, M.-D. Salsac, F. Scarlassara, S.Siem, P.P. Singh, A.M. Stefanini, O. Stezowski, B. Sulignano, S. Szilner, C. Ur, J.J.Valiente-Dobon, M. Zielinska
Phys.Rev.C87 (2013) 054302
”Study of Medium-Spin States of Neutron-rich 87,89,91Rb Isotopes”D.A. Torres, R. Chapman, V. Kumar, B. Hadinia, A. Hodsdon, M. Labiche, X. Liang, D. ODonnell, J. Ollier, R.Orlandi, J.F. Smith, K.-M. Spohr, P. Wady, Z. Wang, P. Mason, L.Corradi, E. Fioretto, A. Gadea, G. de Angelis,B. Guiot, N. Marginean, D.R. Napoli, E. Sahin, R. Silvestri, A.M. Stefanini, S. Szilner, J.J. Valiente-Dobon, F.D.Vedova, M. Axiotis, T. Martinez, D. Bazzacco, S. Beghini, E. Farnea, R. Marginean, D. Mengoni, G. Montagnoli,F. Recchia, F. Scarlassara, C.A. Ur, S.M. Lenzi, S. Lunardi, T. Kroll, F. Haas, T. Faul, M. Hjorth-Jensen, B.G.Carlsson, S.J. Freeman, A.G. Smith, G. Jones, N. Thompson, G. Pollarolo
Phys.Rev.C, submitted
”The structure of chlorine isotopes populated by heavy ion transfer reactions”S. Szilner, L.Corradi, M. Bouhelal, F. Haas, G. Pollarolo, L. Angus, S. Beghini, R. Chapman, E. Caurier, S.Courtin, E. Farnea, E. Fioretto, A. Gadea, A. Goasduff, D. Jelavic-Malenica, V. Kumar, S. Lunardi, N. Marginean,D. Mengoni, T. Mijatovic, G. Montagnoli, F. Nowacki, F. Recchia, E. Sahin, M.-D. Salsac, F. Scarlassara, J.F.Smith, N. Soic, A.M. Stefanini, C.A. Ur, J.J. Valiente-Dobon
Phys.Rev.C87 (2013) 054322
”Transfer reaction studies with spectrometers”
18
S.Szilner, L.Corradi, G. Pollarolo, E. Fioretto, A.M. Stefanini, G. de Angelis, J.J. Valiente-Dobn, E. Farnea, S.Lunardi, D. Mengoni, G. Montagnoli D. Montanari, F. Recchia, F. Scarlassara, C.A. Ur, T. Mijatovic, D. JelavicMalenica, N. Soic, S. Courtin, F. Haas, A. Goasduff, A. Gadea, N.M. Marginean M.-D. Salsac
Acta Phys. Pol. B44(2013)417
”Reaction dynamics and spectroscopy on Ne isotopes by the heavy ion reaction 22Ne+208Pb”S. Bottoni, G. Benzoni, S. Leoni, D. Montanari, A. Bracco, E. Vigezzi, F. Azaiez, L.Corradi, D. Bazzacco, E.Farnea, A. Gadea, S. Szilner, G. Pollarolo
Acta Phys. Pol. B44(2013)457
”Lifetime measurements in neutron-rich Cu isotopes”M. Doncel, E. Sahin, A. Gadea, G. de Angelis, B. Quintana, J.J. Valiente-Dobn, V. Modamio, M. Albers, D.Bazzacco, E. Clment, L.Corradi, A. Dewald, G. Duchene, M.N. Erduran, E. Farnea, E. Fioretto, C. Fransen, R.Gernhuser, A. Grgen, A. Gottardo, M. Hackstein, A. Hernndez-Prieto, T. Hyk, S. Klupp, W. Korten, A. Kusoglu,S. Lenzi, C. Louchart, S. Lunardi, R. Menegazzo, D. Mengoni, C. Michelagnoli, T. Mijatovic, G. Montagnoli, D.Montanari, O. Mller, D.R. Napoli, A. Obertelli, R. Orlandi, G. Pollarolo, F. Recchia, W. Rother, M.-D. Salsac,F. Scarlassara, M. Schlarb, A. Stefanini, B. Sulignano, S. Szilner, C.A. Ur
Acta Phys. Pol. B44(2013)505
”Fusion of 60Ni + 100Mo near and below the Coulomb barrier”A.M. Stefanini, G. Montagnoli, F. Scarlassara, C.L. Jiang, H. Esbensen, E. Fioretto, L. Corradi, B.B. Back,C.M. Deibel, B. Di Giovine, J.P. Greene, H.D. Henderson, S.T. Marley, M. Notani, N. Patel, K.E. Rehm, D.Sewerinyak, X.D. Tang, C.Ugalde and S. Zhu
Eur. Phys. J. A 49 (2013) 63
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V. DETAILS ON THE NEW EXPERIMENT
A. Our collaboration
Our collaboration is not changed since one year ago, and is composed of researchers from Padova (G.Montagnoli100%, D.Montanari 100%, F.Scarlassara 50%), LNL (A.M.Stefanini 100%, L.Corradi 80%, E.Fioretto 100%,Huiming Jia 100%) and Torino (G.Pollarolo 50%). An effective collaboration with the experiment EXOTIC hasbeen started and a first test for studying fusion of stable nuclei using that set-up has been performed. Thejoint work with the experiment GAMMA will continue in the next years when the new GALILEO array will beavailable. Collaborations are active with several external institutions:
1. new MCP detectors are developed in a joint effort with the JINR-Dubna
2. on- and off-line software developments are performed with the help of IFJ PAN-Cracow
3. data analysis of specific experiments is performed at IPHC, CNRS-IN2P3, Univ. of Strasbourg
4. a fruitful collaboration with RBI-Zagreb is open, both for data analysis and for the experiments performedwith the new set-up for astrophysics
5. a collaboration with GSI (D.Ackermann) has been started, concerning the two-body reactions studied withPRISMA, and possible developments of the spectrometer as a whole
B. Fund requirements
The requested funds to Comm.III for 2014 are shown in Fig. 14. The various items are described here belowin some detail, in addition to those that make up the basic running costs of the experimental activity. First,”missioni” (travel money) are specified, then the items are ordered as they appear in Fig. 14, starting fromPadova. Preliminary or recent quotations for specific items are attached in the Appendix.
FIG. 13: One detail of the effects of fire in the Q-pole power supply of Prisma.
1. travel money (for Italy) is requested for participation in the experiments at LNL, and for meetings (fordata analyses, discussion of proposals to the PAC, paper write-up, etc.), including Turin and Milan. Weplan also travels to Naples and Catania in view of possible collaborations. Travels outside Italy are plannedto GSI, Zagreb and Strasbourg (contacts, data analyses), Dubna (development on MCP detectors) and toCracow (on/off-line software). A trip of one person to Argonne National Laboratory is planned to discussthe issues connected with the common measurements.
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2. new preamplifiers + HV supplies are needed for the MWPPAC detector of Prisma (2 kEuro, Padova), withlower noise and higher sensitivity to the signals of light heavy ions, or even α-particles. The prototypeswill be developed by the Electronics Lab. of Padova, following the suggestions of the Dubna group. Thepreamplifiers will then be constructed by an external company; around 30 of them will be necessary (11 forthe working PPAC, 11 for the test set-up and some spares).
3. we reiterate the request for a digital scope with good performance. We are left with two analogue scopesof around 20 years ago, and bad display. So we request a scope LeCroy 354A 500 MHz (6 kEuro, Padova).The 500 MHz bandwidth is necessary since we have to check fast signals from MCP silicon and PPACdetectors, with a few or even '1 ns risetimes.
Padova LNL Torino
Missioni Interne 5 Estere 6
Interne 4 Estere 8
2 2
Consumo Rinnovo Pre PPAC 2 Si e monitor x Pisolo ed Exo<c 10 Coppia MCP Pisolo 43x63 mm2 4 Flange aErezzate x cam. scaE. 2
Isotopi arricch. (54Cr,58Fe, 30Si) 10 Ricambi alim. magne< Prisma 9 Cons. vario, gas, cavi, manutenz. mov. Pisolo e flange su Exo<c 5
Inventario Oscillosc. Digitale Lecroy 6 Controllo turbo Φ=150 Pisolo 4 Pompa turbo Φ=63 Pisolo 5 Pompa a secco x Pisolo 5
Ricambi mis. vuoto Prisma 7 TDC x misura tempo driW (pos. Y) 5 Flash ADC per II braccio 12
Totali 49 60 4
FIG. 14: Requested funds for 2014.
4. a 43x63 mm2 MCP detector pair (the cost is 4 kEuro, Padova) is necessary both for Pisolo and for the testwith Exotic. It is not a spare because these detectors get damaged with the beam and we could not buyany of them this year.
5. a certain number of CF100 stainless steel flanges (2kEuro, Padova) will be necessary, equipped with HV,Lemo, BNC signal, gas inlet and outlet feedthrough’s, for the use with the sliding seal chamber. Theywill have to be manifactured by an external company, because we cannot get additional work-time in thePadova or LNL workshops.
6. Silicon detectors with various active areas and mountings are requested for the electrostatic deflector set-up(stop detector 600 mm2, and at least 4 monitors (50 mm2)). A large area 900 mm2 is needed for the usewith Exotic. The total request is 10 kEuro (Padova). Typically, these detectors have to be replaced every1-1.5 years, depending on the use.
7. the control module of the big turbo pump of Pisolo φ= 150 mm (4kEuro, Padova) has stopped workingand we are presently using a unit borrowed from the Servizio Utenti of LNL. A new small turbo pumpφ=63 mm (5kEuro, Padova) is requested, to be used in front of ionization chamber of Pisolo to improve thevacuum quality in the MCP detector area. Moreover, a new oil-free pre-vacuum pump (5kEuro Padova)is necessary for the whole Pisolo set-up. This must replace the very old one working with oil with risk ofcontamination of the scattering chamber, detectors, targets, etc.
8. selected enriched isotopes will be needed for the experiments in 2014. A preliminary quotation is attachedfor 54Cr,58Fe, 30Si (10 kEuro, LNL). See above in this Report for reference.
9. a list of spare parts for the power supplies (PS) of PRISMA magnets is attached to this Report, togetherwith the quotation of Danfysik (9kEuro, LNL). Actually, there has been recently a serious problem with thequadrupole PS, due a fire during a very recent experiment (see Fig.13). For reparation, we could borrow afew electronic boards, transistor banks and capacitors from the LNL Accelerator Division and we used upmost of our spare parts. The 4 kEuro allocated for 2013 will be totally consumed for partially restoring theused parts to the Accelerator Division. Nevertheless, not everything in the list of pag.30 will be necessary:we are requesting items in pos.1,5 (two), 6, 7, 8, 9, 10, 11 (two), 12 and 15 (five, these are transistor banks).
21
Richieste ai servizi LNL per il 2014 Servizio Lavoro richiesto Tempo
(mesi uomo)
Officina meccanica Installazione II braccio di Prisma (con rivelatori, meccanica, allineamen@)
6
Servizio Uten@ (Supporto App. Sperim.)
Controllo PLC del vuoto Pisolo Upgrading controllo x II braccio
3 1
STIE (Servizio Tecnologie Informa@che ed EleOroniche)
Assistenza durante gli esperimen@ Prisma e Pisolo, sviluppi per nuovo DAQ per Prisma
3
Richieste ai servizi Padova per il 2014 Servizio Lavoro richiesto Tempo
(mesi uomo)
Ufficio Tecnico Alloggiamento rivelatori LaBr3 su coperchio cam. sliding seal dedicato Suppor@ rotan@ per rivelatori interni alla cam. sliding seal
2
Officina Meccanica Costruzione par@ per il sistema di rotazione del II braccio su camera sliding seal, installazione e allineamen@
6
Laboratorio EleOronica OTmizzazione fast ampl. + HV per i due PPAC
2
FIG. 15: Requests presented to the mechanical and electronic workshops of Padova and LNL, and to the UsersService and STIE of LNL.
10. several new vacuum meters for PRISMA (7kEuro, LNL) are necessary after more twelve years of use of theoriginal ones. We recently had to replace some of them, but we don’t have any more spares.
11. a VME Flash ADC (12 kEuro, LNL) is requested for sampling of the Bragg curve in the IC of the secondarm of Prisma. We propose to buy also a TDC (5 kEuro, LNL) to perform the measurement of the drifttime giving the Y signal from the IC of Prisma; this will improve the ion tracking in the spectrometer, asplanned last year.
Fig. 15 reports in some detail the requests to the mechanical and electronic workshops of Padova and LNL,and to the Users Service and STIE of LNL.
C. Milestones
1. Recent milestones 2013
1) - to propose at the LNL PAC an experiment on sub-barrier fusion in medium-light systems (July 30, 2013)→ milestone reached 100%
2) - to propose at the LNL PAC an experiment on nucleon transfer channel in 48Ca+ 48Ca (July 30, 2013)→ system replaced by 197Au+ 130Te, milestone reached 100%, see elsewhere in this report
3) - to perform the approved experiment ( 92Mo+ 54Fe, proton-rich) about sub-barrier transfer (July 30, 2013)→ milestone reached 100%
4) - to complete the installation of the new scattering chamber for PRISMA (July 30, 2013)→ we propose to shift this milestone to October 31 2013, see elsewhere in this report
5) - to test the new detectors and perform the DAQ upgrading for the second arm of PRISMA (December 20,2013)→ see elsewhere in this report
22
2. Proposed milestones for 2014
1) - to complete the installation and the in-beam commissioning of the 2nd arm of PRISMA, including theFlash ADC for the read-out of the Bragg chamber (July 30, 2014)
2) - to complete the in-beam tests with the Exotic set-up for the measurement of sub-barrier fusion with stablebeams (July 30, 2014)
3) - to perform the approved experiments on deep sub-barrier fusion with medium-mass and light systems (July30, 2014)
4) -to perform a sub-barrier transfer experiment with a A∼200 Piave-ALPI beam in inverse kinematics, usingPRISMA with its 2nd arm (November 30, 2014)
5) - to install and test the TDC for the Y read-out from the IC of PRISMA (better ion tracking) (December20, 2014)
[1] A.M.Stefanini et al., Nucl. Phys. A701 (2002) 217c ; F.Scarlassara et al., Nucl. Phys. A 746 (2004) 195c; A.Latina et al., Nucl. Phys. A734 (2004) E1
[2] H.Esbensen, Phys. Rev. C 85, 064611 (2012).[3] S. Gary and C. Volant, Phys. Rev. C 25, 1877 (1982); Y. Nagashima et al., Phys. Rev. C 33, 176 (1986).[4] G. Montagnoli et al., Phys. Rev. C 85, 024607 (2012).[5] Proc. Int. Conf. FUSION11. EPJ Web of Conferences, vol.17, 05001 (2011)[6] C. L. Jiang, H. Esbensen, B. B. Back, R. V. F. Janssens, and K. E. Rehm, Phys. Rev. C 69, 014604 (2004)[7] G.Montagnoli et al., Phys. Rev. C87, 014611 (2013).[8] A. M. Stefanini et al., Phys. Rev. C 78, 044607 (2008).[9] N. Rowley, G. R. Satchler, and P. H. Stelson, Phys. Lett. B 254, 25 (1991).
[10] M. Beckerman et al., Phys.Rev.Lett.45, 1472 (1980).[11] B. Sikora et al., Phys.Rev. C 20, 2219 (1979).[12] H.Timmers et al., Nucl. Phys. A633 (1998) 421.[13] C. L. Jiang et al., Phys. Rev.Lett. 89 (2002) 052701.[14] H. Esbensen et al., Phys. Rev. C40 (1989) 2046.[15] C. H. Dasso and G. Pollarolo, Phys. Lett. B 155 (1985) 223.[16] B.F. Bayman and J. Chen, Phys. Rev. C26, 1509 (1982)[17] E. Maglione, G. Pollarolo, A. Vitturi, R. A. Broglia and A. Winther, Phys. Lett. B162, 59 (1985)[18] J.H. Sorensen and A. Winther, Nucl. Phys. A 550, 306 (1992).[19] L. Corradi, S. Szilner et al., Phys. Rev. C 84, 034603 (2011).[20] D Montanari et al. 2013 J. Phys.: Conf. Ser. 420 012161[21] P. Van Isaker, D.D. Warner and A. Frank, Phys. Rev. Lett. 94, 162502 (2005).[22] The Scientific Objectives of the Spiral2 Project(2006), http//www.ganil.fr/research/developments/spiral2.[23] A. Winther, htpp:/www.to.infn.it/∼nanni/grazing.[24] S. Szilner, C. Ur, L. Corradi, G. Pollarolo et al., Phys. Rev. C 76, 024604 (2007).[25] V. Zagrebaev and W. Greiner, Phys. Rev. Lett. 101 (2008) 122701.[26] K.-L. Kratz et al., Astrophys. J. 403 (1994) 216.[27] H. Grawe et al., Rep. Prog. Phys. 70 (2007) 1525.[28] Y. Watanabe et al., PAC Proposal GANIL, March 2010.[29] E. Kozulin et al. PAC proposal NRO110, and P. Mason et al., PAC Proposal I175, JYFL Sept. 2011.[30] S. Szilner et al., Phys. Rev. C 76 (2007) 024604.[31] D. Montanari et al., Eur. Phys. J. A 47, 1-7 (2011)[32] C.R. Gruhn et al., Nucl. Instr. and Meth. 196 (1982) 33.[33] H.G. Ortlepp and A. Romaguera, Nucl. Instr. and Meth. A276 (1989) 500.[34] L.N. Andronenko et al., Nucl. Instr. and Meth. A312 (1992) 467.
23
VI. APPENDIX: QUOTATIONS
Quotation for the Silicon detectors for Pisolo, Exotic and monitors.
24
Quotation for the MCP pair 43x63 mm2 to be used in Pisolo and Exotic.
TOPAG - Nieder-Ramstädter Str. 247 - 64285 Darmstadt
Instituto Nationale di Fisica NucleareSezione di PadovaVia Marzolo 8
I-35131 PadovaItaly
Page: 1Customer No.: B10670Processed by: JägerVAT No.: IT04430461006Date: 20.10.2011Offer No. 2115450
Dear Mr.Montagnoli,thank you for your inquiry with reference ZD201EEBOF, dat. Oct. 18th 2011. We are pleased to offer asrequested:
Item Qty.Unit Art.-No. Description Unit priceEUR
Discount%
ValueEUR
1 2 Stk MCP43x63 MCP43x63 Dimension 43mm x 63mm,
Active area 39mm x 59mmThickness 0.75mm ± 0,02mmChannel diameter 15µm ± 0,5µm, Matched pair for chevronconfigurationwith tolerance R<5%
1.690,00 5,00 3.211,00
Price: plus shipment (20 €), without VAT (VAT-ID-No. required)Delivery time: immediately from stock (subjects to goods being unsold)Validity of quotation: 8 weeksPayment terms: 60 days, netAll deliveries and transactions based on our general sales conditions.
With best regards
Erwin Jäger
VAT No.: DE156975338Geschäftsführer: Dr. Erwin Jäger, Dr. Udo Umhofer
Registergericht Darmstadt HRB 5551Tax No.: 007 246 12689
25
Quotation for the Lecroy digital scope.
26
Quotation for the control module of the turbo pump φ= 150 mm for Pisolo.
Tel: 049/8068111 , Fax: 049/641925
OFFERTA RELATIVA A FORNITURA DI MAG DRIVE DIGITAL DAL MAGAZZINO DEI PRODOTTI " RIGENERATI"
Vi ringraziamo per la Vostra richiesta.Sulla base delle nostre condizioni generali di vendita Vi sottoponiamo la nostra migliore offerta.
_________________________________________________________________________________________Posizione Nr.codice Quantità Descrizione Prezzo unitario Prezzo complessivo
EUR EUR_________________________________________________________________________________________
00010 400035V0011 1 MAG.DRIVE digital-LINE
PREZZO SPECIALE 3.451,00 3.451,00
Somma posizioni 3.451,00 Importo finale 3.451,00
Tempo di consegna:
Condizioni di fornitura: CIP LEGNARO : Franco nolo e assicuraz.Costi di spedizione addebitati in fattura
Pagamento:60 gg. data fattura fine mese
Noi rispondiamo dei danni assicurati ed inoltre dei danni causati intenzionalmente o dovuti a grave negligenza da partenostra.Periodo di garanzia 12 mesi.
Validità: fino al 21.08.2013
Importo minimo fatturabile: Euro 150,--
Per ordini inferiori a Euro 500,-- le spese di spedizioneVi verranno addebitate in fattura.
Venditore: Giuseppe ManfrediTel.: 02-27223203, Fax: 02-27223217
I.N.F.N. Laboratori Nazionali di LeV.LE DELL'UNIVERSITA' 2I-35020 LEGNARO PD
Nr.di partita IVA: IT04430461006
______________________________________________________________________________Forniture e prestazioni vengono effettuate sulla base delle condizioni generali stampate sul retro. La data di consegna corrisponde alla data del documento di trasporto.______________________________________________________________________________Oerlikon Leybold Vacuum GmbH Geschäftsführer: Banken: Kto BLZ BIC Code(SWIFT)Bonner Str.498, DE-50968 Köln Dr.Martin Füllenbach, Torsten Beyer, Commerzbank AG, Köln 978227800 37080040 DRESDEFF370T +49(0)221 347-0 Wolfgang Ehrk IBAN DE85 37080040 0978227800F +49(0)221 347-1250 Aufsichtsratvorsitzender: Deutsche Bank AG, Köln 102996600 37070060 DEUTDEDKSitz der Gesellschaft: Köln Jürg Fedier IBAN DE50 37070060 0102996600 www.oerlikon.comAmtsgericht Köln HRB-Nr. 26670 Steuer-Nr: 219/5828/1250 Finanzamt Köln-Süd ID-Nr. DE174555805 [email protected]
Indicare nella corrispondenza e nei pagamenti_____________________________________Nr.offerta Codice cliente Data_____________________________________
20336839 109460 23.05.2013_____________________________________
Nr.di partita IVA: DE174555805
Foglio: 1/ 2
Oerlikon Leybold Vacuum GmbH / DE-50963 Köln__________________________________________________________________________________________________________________________________________________________________________________
Vs. riferimento: Elisabetta BertoccoTel.: 0227223-202,Fax: 0227223-217
Offerta
27
Quotation for the turbo scroll pump φ= 63 mm for Pisolo.
28
Quotation for the oil-free primary pump for Pisolo.
120982
Pfeiffer Vacuum Italia S.p.A.
Via Luigi Einaudi 21
I 20037 Paderno Dugnano
02 93 99 0533
02 93 99 051
Infn Lab.Nazionali LegnaroIstituto Nazionale di FisicaNucleare
Viale dell'Università 2
Descrizione Q.tà Prezzo/pz
ACP 15
OffertaFax.
Tel.
Tel: 049-8068311
Data:
Sabrina Borghi +39 02 939 90 523
In riferimento alla Vs. richiesta, Vi sottoponiamo la nostra migliore quotazione.
www.pfeiffer-vacuum.it
11.07.2012
(MI)
I 35020 Legnaro (PD )
A P A S S I O N F O R P E R F E C T I O N
pos. Codice articolo
100168/
Eur
1 V5SATSMFEF 2 8.199,67Pompa primaria a secco ACP 15frictionlesscon le seguenticaratteristiche tecniche:- Velocità di pompaggio: 14 m3/h a 1 mbar ass.- Vuoto finale: 5 x 10-2 mbar ass. (3 x 10-1 mbar ballast aperto) - Potenza assorbita: max 0,6 Kw- Raffreddamento ad aria (10-40 °C)- Attacchi per controllo remoto- Possibilità di scegliere differenti velocità di rotazione- Conta ore digitale- Gas ballast integrato- Intervallo manutenzione : h 20.000- Flangia in/out: DN 25/DN16 ISO-KF- Tenuta : 5 x 10-7 mbar.l/s- Alimentazione: 90 ÷ 254 V DC- 50/60 Hz- IFC (convertitore di frequenza integrato)
4.099,84
Per ulteriori informazioni tecnico-commerciali si prega di contattare il nostro agente di zona Sig. FrancoFerretto al n. 340-0638479
Condizione di fornitura:Condizioni generali: Orgalime S2000Resa: Porto francoImballo standard: compresoGaranzia: 12 mesi Pagamento: 90 GG. D.F.F. M. BBConsegna: ca. 5/6 sett.dal ric.ord, da confermare in fase d'ordineValidità offerta: 3 mesi
1.721,93
Totale Netto escl. IVA
IVA
8.199,67
1 2pagina /
29
Quotation for the enriched isotopes.
France
Fax : 33 (0)1 30 43 86 54
Name Dr Alberto Stefanini
Company Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali di Legnaro
Address Viale dell' Università 2,
35020 Legnaro (PD)
ITALY
Phone: +390498068628
Fax : +39 049 419 25
Email [email protected]
Product Code # Product Description Qty Price List Packaging Special Price Total Delivery
M-Cr54 Chromium-54, metal form, IE > 99% 1 On request 200mg 4 420,00 € 4 420,00 € 2-3 weeks
M-Fe58 Iron-58, metal powder, IE = 92.3% 1 On request 100mg 2 010,00 € 2 010,00 € 1-2 weeks
M-Fe58 Iron-58, metal powder, IE > 99.8% 1 On Request 100mg 2 590,00 € 2 590,00 € 1-2 weeks
M-Si30 Silicon-30, small metal particles, IE > 99% 1 On request 100mg 1 050,00 € 1 050,00 € 4-5 weeks
M-Ca48 Calcium-48, carbonate form (CaCO3), IE = 97.1% 1 On request 100mg 22 500,00 € 22 500,00 € 4-5 weeks
Sub total 32 570,00 €
Shipping 40,00 €
Total (Tax Excl.) 32 610,00 €
V.A.T. (if applicable) N 19,60% 0,00 €
Total TTC 32 610,00 €Total Vat incl.
Notes and comments
Bank information BANK CIC Paris anjou Entreprises
102 BD Haussmann 75382 Paris Cedex 08
IBAN FR76 3006 6108 0100 0114 7730 133
BIC CMCIFRPP
Company Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali di Legnaro Cortecnet
Name Dr Alberto Stefanini Name Shirley Legrand
Title Title Sales Technical Engineer
Signature Signature
VAT Number FR 14 402 792 048
SIRET 40 279 204 800 041
Code APE 4675Z
Company Information
REQUEST FOR QUOTE [email protected]
www.cortecnet.com
Quote #: 130702_INFN Legnaro
Quotation date : 02/07/2013
Expiration Date : 17/07/2013
Cortecnet Europe
15/17, rue des Tilleuls
78960 Voisins-Le-Bretonneux
Tel : 33 (0)1 30 12 11 31
30
Quotation for the spare parts of the magnet power supplies.
4.pdf
Danfysik A/S • Gregersensvej 8 • DK-2630 Taastrup • Denmark Tel. +45 7220 2400 • Fax +45 7220 2410 • [email protected] • www.danfysik.com
VAT reg. No. DK 31 93 48 26 • Bankers: Jyske Bank, Denmark
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Danfysik A/S • Gregersensvej 8 • DK-2630 Taastrup • Denmark Tel. +45 7220 2400 • Fax +45 7220 2410 • [email protected] • www.danfysik.com
VAT reg. No. DK 31 93 48 26 • Bankers: Jyske Bank, Denmark
DAN
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31
Quotation for the new vacuum meters for Prisma.
32
Quotation for the TDC for the measurement of the drift time in the IC of Prisma and for theVME Flash ADC for the read-out of the Bragg chamber of the second arm of the spectrometer.
13OFC-00739.pdf
Spettabile
INFN - LAB. NAZ. LEGNARO
VIALE DELL`UNIVERSITA` 2
35020 LEGNARO (PD)
Italy
Luogo di Destinazione
INFN - LAB. NAZ. LEGNARO
VIALE DELL`UNIVERSITA` 2
35020 LEGNARO (PD)
Italy
13OFC.00739
Viareggio, 10/07/2013
Offerta N.
Via Vetraia, 11 - 55049 Viareggio (LU) - Italy
tel. +39.0584.388.398 - fax +39.0584.388.959
[email protected] - www.caen.it
Come da Voi richiesto, Vi sottoponiamo la nostra migliore offerta per la fornitura di:
Cod.IVA
TotaleSconto %Prezzo
UnitarioQ.tà
Cons.***
Cons.**
DescrizioneCodice Prodotto *
1Pagina
Costruzioni Apparecchiature Elettroniche Nucleari C.A.E.N. S.p.A.
IVA213.404,7033.510,001WV775XACAAAA V775AC - 32 Channel Multievent TDC (No JAUX No12VDCDC, No live ins)
60G 90G
IVA21210,60210,601WESTGARAAAAA Estensione garanzia da 1 a 3 anni V775AC
IVA213.083,003.083,001WV775XNCAAAA V775NC - 16 Channel Multievent TDC (No JAUX, No12V DCDC, No live ins)
60G 90G
IVA21184,98184,981WESTGARAAAAA Estensione garanzia da 1 a 3 anni V775NC
IVA2110.146,0010.146,001WV1751XAAAAA V1751 - 4/8 Ch. 10 bit 2/1 GS/s Digitizer:3.6/1.8MS/ch, EP3C16, SE
60G 90G
IVA21608,76608,761WESTGARAAAAA Estensione garanzia da 1 a 3 anni V1751
IVA2140,0040,001WSPESETRASPO Spese di trasporto
IVA2110,0010,001WASSICTRASPO Assicurazione trasporto
Capitale Sociale 500.000€ int. vers. - C.F., P.I. e Reg. Imprese di Lucca n. 00864500467 - R.E.A. C.C.I.A.A. LU n. 102690 - VAT IT 00864500467 - n. mecc. LU000613
Iscritta all'albo dei Laboratori di Ricerca (Dec. Min 25/5/1990)
