Meeting on gas and Si detectors for the PRISMA and VAMOS spectrometers GANIL, October 2nd, 2008 E. Fioretto - LNL1 Status of the magnetic spectrometer PRISMA E. Fioretto INFN Laboratori Nazionali di Legnaro E. Fioretto INFN Laboratori Nazionali di Legnaro Meeting on gas and Si detectors for the PRISMA and VAMOS spectrometers GANIL, October 2nd, 2008 E. Fioretto - LNL2 PRISMA in vacuum mode Target Beam Rotating platform Quadrupole 30 cm 50 cm Dipole 60 120 cm -20 +130 PRISMA: a large acceptance magnetic spectrometer 80 msr; B = 1.2 Tm A/A ~ 1/200 Energy acceptance 20% Meeting on gas and Si detectors for the PRISMA and VAMOS spectrometers GANIL, October 2nd, 2008 E. Fioretto - LNL3 PRISMA : the Start detector Quadrupole Dipole Target X Y MCP t ~ 350 ps, X, Y ~ 0.5 mm G. Montagnoli et al. NIM A547, 455 (05) Meeting on gas and Si detectors for the PRISMA and VAMOS spectrometers GANIL, October 2nd, 2008 E. Fioretto - LNL4 PRISMA : the Focal Plane Detector Quadrupole Dipole Target S. Beghini et al. NIM A551, 364 (05) X position t ~ 300 ps, X, Y = 1 mm MWPPAC Meeting on gas and Si detectors for the PRISMA and VAMOS spectrometers GANIL, October 2nd, 2008 E. Fioretto - LNL5 PRISMA : the Focal Plane Detector Quadrupole Dipole Target Z=30 E/E < 2% Z/ Z ~ 60 for Z=20 Ionization chamber 70 Zn+ 238 U Meeting on gas and Si detectors for the PRISMA and VAMOS spectrometers GANIL, October 2nd, 2008 E. Fioretto - LNL6 CLOVER array (up to March 2008) Quadrupole Dipole 23 EUROBALL Clovers Efficiency ~ 3 % (E = 1.3 MeV) FWHM = 0.9% (for =10%) Peak/Total ~ 45% CLARA Meeting on gas and Si detectors for the PRISMA and VAMOS spectrometers GANIL, October 2nd, 2008 Shell N=20/32/34/50/82 Collectivity (deformation) and dynami- cal symmetries Lifetime measurements Pairing vibrational states Molecular resonances Multinucleon transfer reactions E. Fioretto - LNL7 Main topics of the PRISMA-CLARA campaign Grazing reactions as a tool to study n-rich nuclei Meeting on gas and Si detectors for the PRISMA and VAMOS spectrometers GANIL, October 2nd, Si E. Fioretto - LNL8 Around the island of inversion (4 + ) (6 + ) PRISMA =56 36 S MeV X. Liang et al., PRC 74, (2006) rotor vibrator E (keV) CLARA Meeting on gas and Si detectors for the PRISMA and VAMOS spectrometers GANIL, October 2nd, 2008 E. Fioretto - LNL9 Exploring the 48 Ca region MeV nat Mg 10.0% 8.0% d DegraderTarget EE g for BLF 208 Pb Differential Plunger PRISMA CLARA RDDS method 48 Ca MeV Mass resolution after degrader is preserved EE EE E : Doppler corrected Meeting on gas and Si detectors for the PRISMA and VAMOS spectrometers GANIL, October 2nd, 2008 J.J. Valiente-Dobn et al., LNL Annual Report 2007 and to be published E. Fioretto - LNL10 Exploring the 48 Ca region IuIu IsIs Ca (2 + ) 50 Ca 51 Sc The measured transition probability in 50 Ca is lower than in doubly-magic 48 Ca, in agreement with shell-model calculations (tuned with previous experiments in the mass region) Transition probabilities Meeting on gas and Si detectors for the PRISMA and VAMOS spectrometers GANIL, October 2nd, 2008 E. Fioretto - LNL11 Spectroscopy of heavy Cr isotopes 64 Ni MeV N. Mrginean et al., PLB 633 (2006) 696 rays from the yrast levels of 58 Cr observed for the first time Meeting on gas and Si detectors for the PRISMA and VAMOS spectrometers GANIL, October 2nd, Cr E. Fioretto - LNL12 -softness in heavy Cr and Fe isotopes 64 Ni MeV N. Mrginean et al., PLB 633 (2006) 696 The R(E4/E2) ratio for the heavy Fe isotopes is very close to the 2.50 value characteristic of -soft rotors (S. Lunardi et al., PRC 76, (2007)) 58 Cr lies exactly at the 2.20 value predicted for the E(5) dynamical symmetry. The energies of the yrast band are in good agreement with the predictions. F.Iachello PRL85, 3580 (2000) Meeting on gas and Si detectors for the PRISMA and VAMOS spectrometers GANIL, October 2nd, 2008 Scientific output 24 experiments (Jan Mar 2008) 16 papers + 2 submitted Over 40 presentations at international conferences/workshops User Access ~ 50% of the total beam-time of the Tandem/PIAVE-ALPI accelerator complex of INFN-LNL ~ 200 European users most of them supported within the Transnational Access activity of the EC-contract EURONS Education 8 thesis (diploma, PhD, ) Support (research contracts) 8 person-years funded by INFN 5 person-years for Nuclear Structure Based Facilities funded by EC through EURONS (only partly devoted to PRISMA-CLARA) E. Fioretto - LNL13 Summary of the PRISMA-CLARA campaign Meeting on gas and Si detectors for the PRISMA and VAMOS spectrometers GANIL, October 2nd, 2008 E. Fioretto - LNL14 The AGATA demonstrator at LNL 1 symmetric triple-cluster 5 asymmetric triple-clusters 36-fold segmented crystals 555 digital-channels Eff. 3 7 M = 1 Eff. 2 4 M = 30 Full DAQ with on-line PSA and -ray tracking In beam Commissioning First test site: LNL Telescopic beam line Support frame LN 2 line The first subset of AGATA (the Demonstrator Array) will soon start operation at the Laboratori Nazionali di Legnaro. The installation is in progress. 23 LOIs 16 Institutions CLARA vs. AD PRISMA + AD + Plunger PRISMA + CLARA + Plunger Meeting on gas and Si detectors for the PRISMA and VAMOS spectrometers GANIL, October 2nd, 2008 E. Fioretto - LNL15 PRISMA in Gas-Filled mode Detector chamber for GFM Magnetic dipole Gas-flow control system The new detector-chamber mounted on PRISMA Meeting on gas and Si detectors for the PRISMA and VAMOS spectrometers GANIL, October 2nd, 2008 E. Fioretto - LNL16 PRISMA in Gas-Filled mode 58 Ni 112 Sn 148 Sm 176 Hf 208 Pb 252Fm according to Betz Problems with magnetic rigidity PRISMA max rigidity for central trajectories cross sections are known, so it is an ideal case for validating the simulations the average charge state can be very low in gas for a slow, heavy ion for a central trajecto- ry Prisma is limited to A