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Title page. Coulomb Excitation of Neutron Rich Zn Isotopes. J Van de Walle 1 , I. Stefanescu 1 , P Mayet 1 , O Ivanov 1 , F Aksouh 1 , D Smirnov 1 , JC Thomas 1 , R Raabe 1 , M Huyse 1 , P Van Duppen 1 1 IKS KULeuven Belgium

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  1. Title page Coulomb Excitation of Neutron Rich Zn Isotopes J Van de Walle1, I. Stefanescu1, P Mayet1, O Ivanov1, F Aksouh1, D Smirnov1, JC Thomas1, R Raabe1, M Huyse1,P Van Duppen1 1 IKS KULeuven Belgium O Niedermaier2, M Lauer2, V Bildstein2, H Scheit2, D Schwalm2, N Warr3, D Weisshaar3, J Eberth3, M Pantea4, G Schrieder4, O Kester5, F Ames5, T Sieber5, S Emhofer5, B Wolf5, R Lutter5, D Habs5, P Butler6, J Cederkall6, P Delahaye6, S Franchoo6, Y Kojima6, U Koster6, T Nilsson6, F Wenander6, J Iwanicki7, A Hurst7, F Azaiez8, F Ibrahim8, O Perru8, M Stanoiu8, O Sorlin8, D Verney9, Th Behrens10, Th Kroll10, R Krucken10, G Sletten11, the MINIBALL collaboration and the REX-ISOLDE collaboration 2 Max Planck Institut fur Kernphysik Heidelberg Germany 3 Institut fur Kernphysik Universitat Koln Germany 4 TU Darmstadt Germany 5 LMU Munchen Germany 6 CERN Switserland 7 University of Liverpool Great Britain 8 IPN Orsay France 9 GANIL Caen France 10 TU Munchen Germany 11Neils Bohr InstituteRoskilde Denmark

  2. Phys Mot (Chart) Physics Motivation Experimental Setup Experimental Results N=40, 50 74,76,78Zn (Z=30) Z=28 78Ni Physics Motivation Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  3. Phys Mot (Ni) Physics Motivation Experimental Setup Experimental Results Physics Motivation : Ni Ni isotopes 50 50 g9/2 g9/2 28 40 40 40 p1/2 p1/2 f5/2 f5/2 p3/2 p3/2 28 28 f7/2 f7/2 20 20 Langanke et al, PRC 67, 2003 Sorlin et al, PRL 88, 2002 Broda et al, PRL 74, 1995 neutrons protons Z=28 N=28...40 68Ni Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  4. Phys Mot (Zn) Physics Motivation Experimental Setup Experimental Results Physics Motivation : Zn Ni isotopes Zn isotopes 50 50 g9/2 g9/2 28 40 40 40 p1/2 p1/2 f5/2 f5/2 Ganil, intermediate energy coulex p3/2 p3/2 28 28 f7/2 f7/2 20 20 Leenhardt et al, EPJA 14, 2002 neutrons protons “Onset of Deformation” 1-Additional protons outside N=28 2-Neutron pairing interactions maximal at N=40 Z=28 N=28...40 72Zn Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  5. Phys Mot (Ge) Physics Motivation Experimental Setup Experimental Results ? RIKEN Intermediate energy coulex Physics Motivation : Ge Ni isotopes Zn isotopes Ge isotopes 50 50 g9/2 g9/2 28 40 50 40 40 p1/2 p1/2 f5/2 f5/2 p3/2 p3/2 28 28 f7/2 f7/2 20 20 neutrons protons Oak Ridge Low energy coulex Iwasaki et al, private communication Z=28 N=28...40 82Ge Padilla-Rodal et al, PRL 94 122501 (2005) Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  6. Exp Setup 1 Physics Motivation Experimental Setup Experimental Results Experimental Setup : REX-Isolde REX-Isolde + "Miniball" since 2001 : 30Mg( PRL 94, 172501 (2005) ) 32Mg 74,76,78Zn 110Sn (poster A. Ekström) 122,124Cd 70Se 84,86,88Kr * selective : laser * efficient * fast Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  7. Exp Setup 1bis Physics Motivation Experimental Setup Experimental Results Experimental Setup : REX-Isolde 1/5 1. Target : UCx (74Zn,76Zn) + neutron converter (78Zn) Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  8. Exp Setup 2 Physics Motivation Experimental Setup Experimental Results 2. Laser Ionization of Zn (RILIS) + Mass separation (GPS) Experimental Setup : REX-Isolde 2/5 1. Target : UCx (74Zn,76Zn) + neutron converter (78Zn) Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  9. Exp Setup 3 Physics Motivation Experimental Setup Experimental Results Experimental Setup : REX-Isolde 3/5 1. Target : UCx (74Zn,76Zn) + neutron converter (78Zn) 2. Laser Ionization of Zn (RILIS) + Mass separation (GPS) 3. Bunching (REXTrap) + Charge Breeding (EBIS) Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  10. Exp Setup 4 Physics Motivation Experimental Setup Experimental Results Experimental Setup : REX-Isolde 4/5 1. Target : UCx (74Zn,76Zn) + neutron converter (78Zn) 2. Laser Ionization of Zn (RILIS) + Mass separation (GPS) 3. Bunching (REXTrap) + Charge Breeding (EBIS) 4. Post Acceleration : ~2.87 MeV/u Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  11. Exp Setup 5 Physics Motivation Experimental Setup Experimental Results  j q Experimental Setup : REX-Isolde 5/5 1. Target : UCx (74Zn,76Zn) + neutron converter (78Zn) 2. Laser Ionization of Zn (RILIS) + Mass separation (GPS) 3. Bunching (REXTrap) + Charge Breeding (EBIS) 4. Post Acceleration : ~2.87 MeV/u 5. Coulomb Excitation : Miniball + DSSD Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  12. Exp Setup 5 bis Physics Motivation Experimental Setup Experimental Results  j q Experimental Setup : REX-Isolde 5/5 1. Target : UCx (74Zn,76Zn) + neutron converter (78Zn) 2. Laser Ionization of Zn (RILIS) + Mass separation (GPS) 3. Bunching (REXTrap) + Charge Breeding (EBIS) ! selective ! 4. Post Acceleration : ~2.87 MeV/u 5. Coulomb Excitation : Miniball + DSSD Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  13. Exp Setup Contam Physics Motivation Experimental Setup Experimental Results without n-converter with n-converter 78Rb E 78Zn 78Ga 78Zn 78Ga DE DE Experimental Setup : Beam Contamination 1 78Zn 78Zn + 78Ga + 78Rb Ibeam,Zn/Itotal  50% Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  14. Exp Setup Contam Physics Motivation Experimental Setup Experimental Results laser ON laser OFF Experimental Setup : Beam Contamination 2 78Zn = laser ionization 78Ga = surface ionization 1. particle spectrum 2. particle count rate (laser ON/OFF) 3. b-decay intensities (laser ON) Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  15. Exp Res 74 (1) Physics Motivation Experimental Setup Experimental Results Experimental Results : 74Zn 74Zn beam on 120Sn target (2.3 mg/cm2 - 2.87 MeV/u) 12.5h ~4E6 parts/sec on target 2+ 1418.6(1) 4+ 606.01(5) 2+ 0+ 74Zn Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  16. Exp Res particles Physics Motivation Experimental Setup Experimental Results beam Strip Number target Experimental Results : particle spectrum 76Zn + 76Ga 120Sn Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  17. Exp Res 74 (2) Physics Motivation Experimental Setup Experimental Results Experimental Results : 74Zn coulex 74Zn beam on 120Sn target (2.3 mg/cm2 - 2.87 MeV/u) 12.5h ~4E6 parts/sec on target : 2+0+ doppler corrected Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  18. Exp Res 76 (1) Physics Motivation Experimental Setup Experimental Results Experimental Results : 76Zn coulex 76Zn beam on 120Sn target (2.3 mg/cm2 - 2.83 MeV/u) 14.5h ~1.3E6 parts/sec on target Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  19. Exp Res 76 (2) Physics Motivation Experimental Setup Experimental Results Experimental Results : 76Zn coulex 76Zn beam on 120Sn target (2.3 mg/cm2 - 2.83 MeV/u) 76Ga 14.5h ~1.3E6 parts/sec on target 76Zn: 2+0+ doppler corrected Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  20. Exp Res 78 (1) Physics Motivation Experimental Setup Experimental Results (8+) (6+) 891 (4+) 2+ 730 0+ 78Zn Experimental Results : 78Zn coulex 78Zn beam on 108Pd target (2.0 mg/cm2 - 2.86 MeV/u) 23.5h ~3.2E4 parts/sec on target 2+ state in 78Zn: fixed Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  21. Exp Res 78 (2) Physics Motivation Experimental Setup Experimental Results Experimental Results : 78Zn coulex 78Zn beam on 108Pd target (2.0 mg/cm2 - 2.86 MeV/u) 23.5h ~3.2E4 parts/sec on target doppler corrected Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  22. Exp Res theory Physics Motivation Experimental Setup Experimental Results Laser On/Off Calculate with  B(E2) Calculate Iin,Zn Spectrum x Iin,Zn+Ga Experimental Results : coulex theory First order perturbation theory : Alder & Winther : "Electromagnetic Excitation - Theory of Coulomb Excitation with Heavy Ions" North-Holland, 1975, Amsterdam ,Zn ,Zn+Ga Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  23. Exp Res BE2 Physics Motivation Experimental Setup Experimental Results  : theoretical B(E2)-values f,p,g - valence space beyond 56Ni core : ANTOINE shell model code (N. Smirnova - University Gent) Experimental Results + Shell Model theory preliminary Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

  24. Concl Physics Motivation Experimental Setup Experimental Results July 2005 : ° 5-8th july : coulex of 68,70Ni (!) ° 13-18th july : coulex of 70Cu isomeres (!) late 2005 ° re-measuring 78Zn + 80Zn Conclusion + Outlook Coulex of 74,76,78Zn : ° fixed 2+ in 78Zn ° preliminary B(E2) values ° systematic errors "understood" Coulomb Excitation of Neutron Rich Zn Isotopes Jarno Van de Walle

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