| NUCLEAR PHYSICS |
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Fission Properties of Neutron-Rich Nuclei around the End Point of $r$-Process |
| Jiawei Chen, Junchen Pei*, Yu Qiang, and Jihuai Chi |
| State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China |
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| Cite this article: |
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Jiawei Chen, Junchen Pei, Yu Qiang et al 2023 Chin. Phys. Lett. 40 012401 |
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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.
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Received: 10 October 2022
Published: 14 December 2022
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| PACS: |
24.75.+i
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(General properties of fission)
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26.30.Hj
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(r-process)
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27.90.+b
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(A ≥ 220)
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21.60.Jz
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(Nuclear Density Functional Theory and extensions (includes Hartree-Fock and random-phase approximations))
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