1. Bericht zu Thorsten Kröll KHuK-Jahrestreffen 5.-6.12.2013

2. … in a nutshell 1.4 GeV protons from PS-Booster ~ 2.85 MeV/u 9-gap Extension hall MINIBALL T-REX ISOLTRAP COLLAPS LIST RILIS CRIS RIB production

3. Production of radioactive molecular beams C. Seiffert (CERN/TU Darmstadt), T. Stora (CERN),... Ionization Isotope production Transport Diffusion Beam purification with molecular beams: new developments: 9 CO +, 8 BF n + technique already used successfully, e.g.: - 70 SeCO + PRL 98, 072501 (2007) - 136 Sn 32 S + NPA 805, 218 (2008) - 140,142 BaF + PRC 86, 034310 (2012)

4. High selective ion beam production with Laser Ion Source & Trap (LIST) Sven Richter, Daniel Fink, Klaus Blaum, Tobias Kron, Klaus Wendt and the RILIS/ISOLDE Collaboration 1. ISOLDE Target: Production of exotic nuclei 2. RILIS: Element selective ionization 3. LIST: Full Isobar Suppression Proof of LIST operation @ UC n target First studies of 217 Po with LIST and KUL Windmill  -Detector LIST isobar suppression for Fr isotopes Selectivity above 1000 - but strongly depending on individual isotope NIM B 317, 417 (2013)

5.  First ever laser spectroscopy on astatine at ISOLDE/RILIS and TRIUMF/TRILIS  Verification of levels, yield measurements using various detector systems  Advanced atomic physics evaluation for the IP and nuclear structure via HFS and IS measurement E IP (At) = 75151(1) cm -1 S. Rothe et al., Nature Comm. 4:1835 (2013) In-source Spectroscopy on Astatine (RILIS - Resonant Ionisation Laser Ion Source)

6. 1g1g 2d2d 3s3s 1h 1g 9/2 1g 7/2 2d 5/2 2d 3/2 3s 1/2 1h 11/2 1h 9/2 50 58 64 68 70 82 92 50 82 Capacity of 1h 11/2 niveau: 12 neutrons → 6 quad. moments But: 10 quad. moments Neutron pairs shared between the neighboring levels. Capacity of 1h 11/2 niveau: 12 neutrons → 6 quad. moments But: 10 quad. moments Neutron pairs shared between the neighboring levels. D.T. Yordanov et al, PRL 110 (2013) 192501 Simple Behavior in Complex Nuclei: Q s -Moments of Cd 11/2 - Isomers COLLAPS (Collinear Laser Spectroscopy) W. Nörtershäuser (TU Darmstadt)

7. Preparation for 2014: A Setup for State-Selective Charge Exchange to Measure Radii and Moments of 53,54 Ca Moments and Radii of 51,52 Ca measured in 2012, 53,54 Ca targeted for 2014 Particle Detection  Higher Efficiency than for fluorescence detection.

8. Magic Number Probed with Ca 8 F. Wienholtz et al., Nature 498, 346 (2013) High E(2+) energy in 52 Ca Mass measurements via S 2n establish magic number at N=32 Correct prediction from 3-N forces S. Kreim (MPI-K Heidelberg)  52Cr 52Ca 52K 39K 350 rev. ≈ 0.5km δm/m ≈ 310 -7 R. N. Wolf et al., NIM A 686, 82 (2012) R. N. Wolf et al., IJMS 349-350, 123 (2013) Multi-reflection time-of-flight mass spectrometry

9. ISOLTRAP‘s other techniques S. Kreim et al., NIMB (2013) DOI:10.1016/j.nimb.2013.07.072 80 ions in 35 minutes! δm/m = 410 -8 Penning-trap mass spectrometry Future plans: Phase-imaging ion-cyclotron-resonance technique  Measure phase evolution of ions‘ eigenmotion instead of frequency  Gain in precision and resolving power S. Eliseev et al. Phys. Rev. Lett. 110 (2013). S. Eliseev et al. Appl. Phys. B, 13 (2013). R. N. Wolf et al., PRL 110, 041101 (2013) S. Kreim et al., DOI:10.1016/j.ijms.2013.02.015 (2013) Depth profile of a neutron star with experimentally known and theoretical masses 82 Zn excluded from crust!!!

10. MINIBALL & T-REX V. Bildstein et al., Eur. Phys. J. A 48, 85 (2012) N. Warr et al., Eur. Phys. J. A 49, 40 (2013) Plans for future (to prepare for HIE-ISOLDE) new DAQ system AC shields for MINIBALL new Si detectors MINIBALL detector repairs Post-accelerated RIBs from REX-ISOLDE Coulomb excitation or nucleon transfer  -ray and particle spectroscopy MINIBALL: 24 segmented HPGe detectors T-REX: Si detector array

11. S. Hellgartner, D. Mücher,...

12. 2 + state at 554 keV, not 241 keV N. Marginean et al., Phys. Rev. C 80, 021301(R) (2009) No sudden onset of deformation in Kr at N=60 (different to Sr and Zr) Change from prolate to oblate shape between N=58 and 60 M. Albers et al., PRL 108, 062701 (2012), NP A 899, 1 (2013) Onset of deformation in Kr at N=60

13. Shell stabilization in N=80 isotones? Observation of a local suppression in collectivity TU Darmstadt | AG Pietralla | MINIBALL/REX-ISOLDE ▪measured B(E2;2 +  0 + ) values of 140 Nd and 142 Sm ▪interpreted as local suppression in collectivity for 138 Ce at filled  g 7/2 orbit Systematics of B(E2) valuesGamma ray spectra Nd-140: C. Bauer et al., PRC 88 (2013), 021302(R) Sm-142: R. Stegmann et al., in preparation for PRC Ba-140: C. Bauer et al., PRC 86 (2012), 034310.

14. 27.05.2016 | TU Darmstadt | AG Kröll Collectivity in even Cd isotopes enhanced collectivity for 122,124 Cd B(E2) in 126,128 Cd agree with shell model irregular E(2 + ) in 128 Cd even Cd nuclei rather spherical... similar to odd Cd isotopes  128 Cd S. Ilieva et al., submitted to PRC S. Bönig et al., in preparation

15. Octupole collectivity in Ra and Rn … REX is going heavyweight!!! 224 Ra, 220,221 Rn … heaviest REX-ISOLDE beams odd isotopes … search for atomic EDM radioactive beams @ REX L.P. Gaffney, P. A. Butler (U Liverpool) M. Scheck (TU Darmstadt) et al., Nature 497, 199 (2013)

16. Stepwise upgrade to 5.5 MeV/u...10 MeV/u higher intensities better beam quality / purity Set-up 2013-15 … … 2017/18 (LINAC4) Extension of physics programme, e.g. heavy nuclei (A≈200) … as low-energy beams unique to ISOLDE Physics goals multiple Coulomb excitation nucleon transfer with heavy beams New instrumentation IDS (ISOLDE Decay Station) TSR … storage ring @ ISOLDE Superconducting LINAC MINIBALL IDS TSR

17. 2 The TSR@ISOLDE project Possible TSR installation above the CERN service-tunnel Tilted beamline coming up from the machine Jura (west) side 36m 26m 4.73m above Isolde hall floor 10m (7m between floor and crane hook) service tunnel  First storage ring at an ISOL-facility  Scientific case approved by the INTC  Technical integration study submitted to the CERN management M. Grieser et al., EPJST 207, 1-117 (2012) K. Blaum (MPI-K Heidelberg)

18. ... the people behind ISOLDE ISOLDE Workshop 2012 2013 at ISOLDE... mining a rich seam of data 21 publications in refereed journals e.g. 4 PRL, 3 Nature Many contributions to conferences Many Bachelor, Master and PhD theses based on work at ISOLDE... important for universities!!! Several improvements are ongoing ISOLDE prepares to receive protons again from June 2014 Thanks to the contributors of the transparencies!!!