科研之友
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摘要
We determined the spontaneous fission lifetime of U-238 by a minimization of the action integral in a three-dimensional space of collective variables. Apart from the mass-distribution multipole moments Q(20) (elongation) and Q(30) (left-right asymmetry), we also considered the pairing-fluctuation parameter lambda(2) as a collective coordinate. The collective potential was obtained self-consistently using the Skyrme energy density functional SkM*. The inertia tensor was obtained within the nonperturbative cranking approximation to the adiabatic time-dependent Hartree-Fock-Bogoliubov approach. The pairing-fluctuation parameter lambda(2) allowed us to control the pairing gap along the fission path, which significantly changed the spontaneous fission lifetime.
- 出版日期2015-3
