Competition between α -decay and spontaneous fission for superheavy nuclei

作者：Xiao Jun Bao, Shu Qing Guo, H F Zhang, Yaowen Xing, J. Dong, J Q Li · 发表于：Journal of Physics G Nuclear and Particle Physics · 年份：2015 · DOI：10.1088/0954-3899/42/8/085101 · 被引用次数：93 · 研究领域：Nuclear physics research studies、Quantum Chromodynamics and Particle Interactions、Atomic and Molecular Physics

The α -decay half-lives of recently synthesized superheavy nuclei (SHN) are investigated by employing a unified fission model (UFM) and Royer’s analytical formula (2000 J. Phys. G: Nucl. Part. Phys. 26 1149 ). The good agreement with the experimental data indicates the UFM and the analytical formula are useful tools to investigate these α -decays. A modified formula is proposed for determining the spontaneous fission half-lives based on Swiatecki’s formula, including the microscopic shell correction and isospin effect.The spontaneous fission half-lives for heavy and SHN in regions from Th to Fl are calculated systematically. Experimental data are well reproduced by the modified Swiatecki formula. The competition between α -decay and spontaneous fission is analyzed in detail and the decay modes are predicted for the unknown cases.