COLLAPS 2012 – Status and Outlook

The Year @ COLLAPS

2

IS 529 Spins, Moments and Charge Radii Beyond 48Ca

IS 497 Laser Spectroscopy of Cadmium Isotopes: Probing the Nuclear Structure Between the Neutron 50 and 82 Shell Closures

IS 484 Ground-state properties of K-isotopes from laser and β-NMR spectroscopy

I 88 β-NMR as a novel technique for biological applications

IS 508 Collinear laser spectroscopy of manganese isotopes using optical pumping in ISCOOL

IS 529: Spins, Moments and Charge Radii Beyond 48Ca

3

Proposal Objectives: 49..52Ca First use of the new optical detection station with ions.

Tac ≈ 100 ms

Tb ≈3μs

release

IS 529: Spins, Moments and Charge Radii Beyond 48Ca

4

52Ca with ≈ 300 ions/s after 4 hours

38 40 42 44 46 48 50 52

-0.15

0.0499999999999999

0.25

0.45

A

δ<r2

>

IS 497: Laser Spectroscopy of Cadmium Isotopes: Probing the Nuclear Structure Between the Neutron 50 and 82 Shell Closures

5

Proposal Objectives: 100..130CdIn the process of reaching this a new wavelength range was opened up.

Commissioning of the laser system

860 nm

430 nm

215 nm

35 mW output maintained over 5 hours

IS 497: Laser Spectroscopy of Cadmium Isotopes: Probing the Nuclear Structure Between the Neutron 50 and 82 Shell Closures

7

130Cd#

coun

ts

dn

transition in Cd II:5s 2S1/2 → 5p 2P3/2

@ 214 nm

IS 484: Ground-state properties of K-isotopes from laser and β-NMR spectroscopy

8

N=20 N=28

40Ca

35P

41Ca

39Ar

38Cl

37S

36P

39Cl

38S

37P

42K

41Ar

40Cl

39S

38P

43K

42Ar

41Cl

40S

39P

45Ca

44K

43Ar

42Cl

41S

40P

45K

44Ar

43Cl

42S

41P

47Ca

46K

45Ar

44Cl

43S

42P

47K

46Ar

45Cl

44S

43P

39Ca

38K

37Ar

36Cl

35S

34P

42Ca 43Ca 44Ca 46Ca 48Ca

39K 40K 41K

40Ar38Ar

37Cl

36S

pd3/2

ps1/2

Z=17

Z=20

nf7/2 np3/2

Z=19 48K 49K 50K 51K

(1/2,3/2)?

IS 484: Ground-state properties of K-isotopes from laser and β-NMR spectroscopy

9

Proposal Objectives: 51K

I 88: β-NMR as a novel technique for biological applications

10

Objective: Demonstrate online β-NMR in liquid samples . Pressure-dependent β-decay asymmetry

MgO single crystalIonic liquidBeam transmission

I 88: β-NMR as a novel technique for biological applications

11

EMIM-Ac

βNMR spectrum for 31Mg in ionic liquid EMIM-Ac

IS 508: Collinear laser spectroscopy of manganese isotopes using optical pumping in ISCOOL

12

Proposal Objectives: 57..66Mn 10.5 shifts of 18 taken.51..64Mn measured including 58,60,62Mn isomers .

N=32

IS 508: Collinear laser spectroscopy of manganese isotopes using optical pumping in ISCOOL

13

Outlook for Ca

14

Radioactive detection of Optically pumped ions after state selective Charge exchange (ROC)

C harge exchange ce ll

Ion beamO ptical pum ping zone

Laser beam

Iondece lera tor

β detector

Tape transport

2S 1/2

2P 1/2

2D 3/2

397.0 nm

The theoretical possibilities:1 ion/s of an even isotope over 5 shifts.

Outlook for Cd

15

Yields drop by 2 orders of magnitude per isotope beyond 100 or 130… The limit.

But

Laser system developed opens up many more possibilities in this region And beyond.

Publications of spins moments and charge radii in preparation .

-> See poster by D. T. Yordanov for more details.

Outlook for K

16

Publications: Spins and Moments (J Papuga et al.) in preparation.Charge radii (K. Kreim et al.) in preparation.

See Poster by Jasna for details.

Future prospects: With an intensity upgrade 52K comes into reach. Quadrupole moments may also shed light on the structural evolution in this region .

Outlook for Bio - β-NMR

17

Publications: Proof of concept results in preparation for publication.See talk by A. Gottberg.

Future prospects: Enormous possibilities for both Biological and Solid State physics .

but

Will require a dedicated beamline and laser systems.

Possibilities to develop polarized beams for an entire range of elements.

Outlook for Mn

18

Analysis underway by B. Cheal and C. Babcock.

Realignment of ISCOOL during the shutdown will allow optical pumping in the cooler for this case and others.

- 65, 66Mn are then easily reached.

Thanks To

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Carla Babcock4, Dimiter Balabanski1, Mark Bissell2, Ivan Budincevic2, Klaus Blaum3, Bradley Cheal4, Marieke de Rydt2, Nadja Frömmgen5, Ronald Garcia Ruiz2, Georgi Georgiev6, Christopher Geppert7,8, Michael Hammen5, Hanne Heylen2, Magdalena Kowalska9, Kim Kreim3, Andreas Krieger5,8, Rainer Neugart3, Gerda Neyens2, Wilfried Nörtershäuser8,10,5, Jasna Papuga2, Mustafa Rajabali2, Rodolfo Sanchez-Alarcon7,10, Stefan Schmidt5,8,10 and Deyan Yordanov3

— 1INRNE, Bulgarian Academy of Science, BG-1784 Sofia,Bulgaria — 2Instituut voor Kern- en Stralingsfysica, Katholieke Universiteit Leuven, Belgium — 3Max-Planck-Institut für Kernphysik,Heidelberg, Deutschland—4School of Physics and Astronomy, University of Manchester, M13 9PL, UK — 5Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, Deutschland — 6CSNSM-IN2P3-CNRS, Universit/ 𝑒 de Paris Sud, F-91405 Orsay, France — 7Helmholtz-Institut Mainz, Mainz, Deutschland — 8Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Deutschland — 9CERN,Physics Department, Geneva, Switzerland—10GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Deutschland