A systematic study of b - decay of neutron-rich Rh and Ag isotopes
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Transcript of A systematic study of b - decay of neutron-rich Rh and Ag isotopes
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A systematic study of b- decay of neutron-rich Rh and Ag isotopes Sixth China Japan Joint Nuclear Physics Symposium
Shanghai, May 16-20, 2006Youbao Wang
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Collaborators and publicationsCollaborators: Youbao Wang, S. Rinta-Antila, P. Dendooven, J. Huikari, A. Jokinen, V. S. Kolhinen, G. Lhersonneau, A. Nieminen, S. Nummela, H. Penttil, K. Perjrvi, J. Szerypo, J. C. Wang, and J. yst Department of Physics, University of Jyvskyl, FINLAND
1. New Levels in 118Pd Observed in the b Decay of very Neutron-Rich 118Rh Isotope Chin. 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 114Pd Phys. Rev. C 67, 024303 (2003) 4. b decay of 116Agm and the vibrational structure of 116Cd Phys. Rev. C 64, 054315 (2001) 5. Beta decay of neutron-rich 116Rh and the low-lying level structure of even-even 116Pd Phys. Rev. C 63, 024309 (2001)
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JYFL Layout
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Transmission: 50 %, M/M=10 (with gas, 1mbar of Helium gas)M/M=100 (in vacuum mode) Recoil Ion Transport Unit
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IGISOL-Ion Guide Isotope Separator On LineIon TrapIon CoolerMagnetBeam StopIon GuideCyclotron beam
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The Principle of Ion Guide
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Main ion guide characteristics fast (ms separation times) no element selectivity large beam energy spread (~100 eV)Fission ion guide
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Partial Nuclide ChartNZ
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Level Systematics for Ru, Pd, and Cd Isotopes
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jj'j2p-4h intruder excitation
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Two isomeric decays of Rh and Ag isotopes
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Experimental setup cylindrical plastic scintillator: = 63 % 4 Ge - detectors tot= 2.4 % (1 MeV) tape transport system
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Decay of 114Rh (1+)
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Decay of 114Rh (7-) (part)
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Decay of 116Rh
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Decay of very neutron-rich 118RhFifteen neutrons from the stable 103Rh
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Systematics of even-mass Palladium Nuclei
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Systematics of two-quasineutron levels
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First observation of complete set of three-phonon quintuplet!
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Decay of 120Ag-- a gated g spectrumGate: 120Cd 505.7 keV 2+0+
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Decay of 120Ag (half life and intensity ratios)
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Comparison of the three-phonon states
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Systematics of low-spin levels in Pd nuclei
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Multi-phonon and intruder states in 116CdM. Kadi et al., PRC68, 031306(R) (2003)
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Thank you!
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Proton-induced fission
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Collective VibrationEnergies of the three-phonon quintuplet in terms of the two-phonon anharmonicities
L(
Formula
03+
3E(22+) - 3E(21+)
31+
-3E(21+) + 6/7E(41+) + 15/7E(22+)
42+
-3E(21+) + 10/7E(41+) + 11/7E(22+)
61+
3E(41+) - 3E(21+)
23+
-3E(21+) + 36/35E(41+) + 4/7E(22+)+7/5 E(02+)
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jj'jThe neutron dependence of proton 2p-2h intruder excitation energiesfor Cd nuclei2p-2h intruder