High spin states in neutron rich nuclei from spontaneous fission

Conference · Thu Dec 31 00:00:00 EST 1992

OSTI ID:10161664

Butler-Moore, K; Zhu, S; Zhao, X; Hamilton, J H; Ramayya, A V; Lu, Q; Ma, W C; Peker, L K; Kormicki, J; Deng, J K; Gore, P; Shi, D; Jones, E F; Xie, H; Gao, W B ^[1]; Cole, J D; Aryaeinejad, R ^[2]; Lee, I Y; Johnson, N R; McGowan, F K ; Bemis, C E ^[3]; Ter-Akopian, G; Oganessian, Yu ^[4]

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1. Vanderbilt Univ., Nashville, TN (United States). Dept. of Physics
2. Idaho National Engineering Lab., Idaho Falls, ID (United States)
3. Oak Ridge National Lab., TN (United States)
4. Joint Inst. for Nuclear Research, Dubna (Russian Federation)

One fragment-{gamma}-{gamma} and three {gamma}-{gamma} coincidence measurements of the prompt {gamma}-rays from the fragments produced in the spontaneous fission (SF) of {sup 252}Cf and very recently of {sup 242}Pu were carried out with a 20 Ge detector ball at HHIRF. With our high statistics, {gamma}-{gamma}-{gamma} coincidences where the two gates are on transitions in the two partner fragments were extracted. Comparing the {sup 252}Cf and {sup 242}Pu data allowed unique placements of many transitions. New, higher spin states were observed in many nuclei, up to 16{sup +} in some of the heavy partners. Levels in several nuclei were observed for the full time. Studies of the fission process included measured relative branchings to the 1n to 6n channels. Much data remains to be analyzed. These data provide new insights into the changing structures at higher spins of many neutron-rich nuclei and the fission process.

• Research Organization: Vanderbilt Univ., Nashville, TN (United States). Dept. of Physics; Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG05-88ER40407; AC05-84OR21400
• OSTI ID: 10161664
• Report Number(s): CONF-920721-15; ON: DE93013889; TRN: 93:015528
• Resource Relation: Conference: 6. international conference on nuclei far from stability and 9th international conference on atomic masses and fundamental constants,Bernkastel-Kues (Germany),19-24 Jul 1992; Other Information: PBD: [1992]
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALIFORNIUM 252
SPONTANEOUS FISSION
PLUTONIUM 242
NUCLEI
HIGH SPIN STATES
GAMMA DETECTION
MOMENT OF INERTIA
663470
663110
663590
FISSION
GENERAL AND AVERAGE PROPERTIES OF NUCLEI AND NUCLEAR ENERGY LEVELS
A = 220 AND ABOVE