A systematic study of b - decay of neutron-rich Rh and Ag isotopes

1. A systematic study of b- decay of neutron-rich Rh and Ag isotopes Youbao Wang Sixth China Japan Joint Nuclear Physics Symposium Shanghai, May 16-20, 2006

2. Collaborators and publications Collaborators:Youbao Wang, S. Rinta-Antila, P. Dendooven, J. Huikari, A. Jokinen, V. S. Kolhinen, G. Lhersonneau, A. Nieminen, S. Nummela, H. Penttilä, K. Peräjärvi, J. Szerypo, J. C. Wang, and J. Äystö Department of Physics, University of Jyväskylä, FINLAND 1.New Levels in 118Pd Observed in the bDecay of very Neutron-Rich 118Rh IsotopeChin. Phys. Lett. 23(4), 808(2006) 2. b decay of neutron-rich 118Ag and 120Ag isotopes Phys. Rev. C 67, 064303 (2003) 3. Decay of 114Rh to 114PdPhys. Rev. C 67, 024303 (2003) 4. b decay of 116Agm and the vibrational structure of 116CdPhys. Rev. C 64, 054315 (2001)   5. Beta decay of neutron-rich 116Rh and the low-lying level structure of even-even 116PdPhys. Rev. C 63, 024309 (2001)

3. JYFL Layout

4. Recoil Ion Transport Unit Transmission: 50 %, M/M=10 (with gas, 1mbar of Helium gas) M/M=100 (in vacuum mode)

5. IGISOL-Ion Guide Isotope Separator On Line Cyclotron beam Ion Trap Ion Cooler Ion Guide Magnet Beam Stop

6. The Principle of Ion Guide

7. Fission ion guide • Main ion guide characteristics • fast (ms separation times) • no element selectivity • large beam energy spread (~100 eV)

8. 132In 50 124Sn 116Sn 118Sn 120Sn 122Sn 128Sn 130Sn 134Sn 126Sn 132Sn 116In 118In 120In 122In 124In 126In 128In 130In 48 122Cd 114Cd 116Cd 118Cd 120Cd 126Cd 128Cd 124Cd 130Cd 68ms 132Cd 97ms 124Ag 126Ag 114Ag 116Ag 118Ag 120Ag 128Ag 58ms 82 84 122Ag 46 112Pd 114Pd 116Pd 118Pd 120Pd 122Pd 78 80 112Rh 114Rh 116Rh 118Rh 0.31s 120Rh 44 110Ru 112Ru 114Ru 116Ru 118Ru 76 74 110Tc 112Tc 114Tc 42 72 108Mo 110Mo 112Mo 66 68 70 Partial Nuclide Chart Z N

9. Level Systematics for Ru, Pd, and Cd Isotopes

10. Collective Vibration 2+ 6+ 4+ 3+ 0+ 3 3 0+ 4+ 2+ 2 2 2 2+ 1 0+ 2p-4h intruder excitation   j j' j

11. Two isomeric decays of Rh and Ag isotopes

13. beam from IGISOL cylindrical plastic scintillator moving tape Experimental setup • cylindrical plastic scintillator: •  = 63 % • 4 Ge - detectors • tot= 2.4 % (1 MeV) • tape transport system

14. Decay of 114Rh (1+)

15. Decay of 114Rh (7-) (part)

16. Decay of 116Rh

17. Decay of very neutron-rich 118Rh Fifteen neutrons from the stable 103Rh

18. Systematics of even-mass Palladium Nuclei

19. Systematics of two-quasineutron levels

20. First observation of complete set of three-phonon quintuplet!

21. Decay of 120Ag-- a gated g spectrum Gate: 120Cd 505.7 keV 2+0+

22. Decay of 120Ag (half life and intensity ratios)

23. Comparison of the three-phonon states

24. Systematics of intruder states in Cd nuclei Systematics of low-spin levels in Pd nuclei

25. Multi-phonon and intruder states in 116Cd M. Kadi et al., PRC68, 031306(R) (2003)

26. Thank you!

27. Proton-induced fission

28. 2+ 6+ 4+ 3+ 0+ 3 3 0+ 4+ 2+ 2 2 2 2+ 1 0+ Collective Vibration Energies of the three-phonon quintuplet in terms of the two-phonon anharmonicities

29. 2p-2h intruder The neutron dependence of proton 2p-2h intruder excitation energies for Cd nuclei    j j' j