Abstract：We studied the fission properties of neutron-rich nuclei $^{278, 286}$Cf around the end point of $r$-process by microscopic self-consistent approaches. The fission barriers and potential energy surfaces are obtained by constrained static Skyrme Hartree–Fock-BCS calculations. Fission fragments are studied by dynamical time-dependent Hartree–Fock+BCS calculations. Results show that $^{286}$Cf has an octupole deformation at ground state, which can increase the fission barrier height by 1.1 MeV and enhance significantly the spontaneous fission half-life. To search possible fission channels, dynamical calculations with a broad coverage of initial deformations result in two slightly asymmetric peaks around $A=128$ and 150 for $^{278}$Cf, and $A=133$ and 153 for $^{286}$Cf. Very asymmetric fission channels as given by semi-empirical models are not found in our results.
(Nuclear Density Functional Theory and extensions (includes Hartree-Fock and random-phase approximations))
引用本文:
. [J]. 中国物理快报, 2023, 40(1): 12401-.
Jiawei Chen, Junchen Pei, Yu Qiang, and Jihuai Chi. Fission Properties of Neutron-Rich Nuclei around the End Point of $r$-Process. Chin. Phys. Lett., 2023, 40(1): 12401-.
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