Competition between {alpha} decay and spontaneous fission for heavy and superheavy nuclei

Journal Article · Wed Oct 15 04:00:00 EDT 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.78.044329· OSTI ID:21192308

Chang, Xu ^[1]; Zhongzhou, Ren ^[1]; Yanqing, Guo ^[1]

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1. Department of Physics, Nanjing University, Nanjing 210008 (China)

We systematically investigate the {alpha}-decay and spontaneous fission half-lives for heavy and superheavy nuclei with proton number Z{>=}90. The {alpha}-decay half-lives are obtained by the deformed version of the density-dependent cluster model (DDCM). In the DDCM, the microscopic potential between the {alpha} particle and the daughter nucleus is evaluated numerically from the double-folding model with the M3Y interaction. The influence of the core deformation on the double-folding potential is also properly taken into account by the multipole expansion method. The spontaneous fission half-lives of nuclei from {sup 232}Th to {sup 286}114 are calculated with the parabolic potential approximation by taking nuclear structure effects into account. The agreement between theoretical results and the newly observed data is satisfactory for both {alpha} emitters and spontaneous fission nuclei. The competition between {alpha} decay and spontaneous fission is analyzed in detail and the branching ratios of these two decay modes are predicted for the unknown cases.

• OSTI ID: 21192308
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 4 Vol. 78; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY
ALPHA PARTICLES
APPROXIMATIONS
BRANCHING RATIO
CLUSTER MODEL
DEFORMATION
DENSITY
FOLDING MODEL
HALF-LIFE
INTERACTIONS
NUCLEAR STRUCTURE
PROTONS
SIMULATION
SPONTANEOUS FISSION
THORIUM 232
TRANSACTINIDE ELEMENTS