Lifetimes of the low spin states in the superdeformed band of {sup 192}Hg

Conference · Tue Sep 01 04:00:00 EDT 1992

OSTI ID:10172702

Lee, I Y; Baktash, C; Cullen, D; Garrett, J D; Johnson, N R; McGowan, F K; Winchell, D F ^[1]; Yu, C H ^[2]

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1. Oak Ridge National Lab., TN (United States)
2. Tennessee Univ., Knoxville, TN (United States)

Superdeformed (SD) states with a 2:1 axis ratio have been observed in nuclei in the A = 150, 190, and the actinide regions. These states depopulate into normally deformed (ND) states by gamma decay, but so far the linking transitions have not been observed and the depopulation mechanism is not fully understood. Nuclei in different mass regions decay out at states with different spin (I), excitation energy above the ND yrast line (U) and lifetime ({tau}). This variation is due to differences in the nuclear properties such as the barrier penetration probability, the level densities and the gamma transition strength of SD and ND states. One important factor is the competition between the collective E2 decay along the SD band and the statistical decay to the ND states. These transition rates, or the partial lifetimes, can be determined if the lifetime and the intensity of the gamma rays depopulating the SD states are known.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400; FG05-87ER40361
• OSTI ID: 10172702
• Report Number(s): CONF-9205108--12; ON: DE92019177
• Country of Publication: United States
• Language: English

Related Subjects

663110
663200
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ENERGY DEPENDENCE
ENERGY-LEVEL TRANSITIONS
GAMMA DECAY
GENERAL AND AVERAGE PROPERTIES OF NUCLEI AND NUCLEAR ENERGY LEVELS
LIFETIME
MERCURY 192
NUCLEAR DEFORMATION
RADIOACTIVITY AND ELECTROMAGNETIC TRANSITIONS (EXCLUDING FISSION)
SPIN
YRAST STATES