Systematic study of α decay half-lives based on Gamow–like model with a screened electrostatic barrier

• Published in: Nuclear physics. A Vol. 987; pp. 350 - 368
• Main Authors: Cheng, Jun-Hao, Chen, Jiu-Long, Deng, Jun-Gang, Wu, Xi-Jun, Li, Xiao-Hua, Chu, Peng-Cheng
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.07.2019
• Subjects: Electrostatic shielding; Gamow-like model; Un-synthesized nuclei; α decay; Electrostatic shielding; α decay; Un-synthesized nuclei; Gamow-like model
• ISSN: 0375-9474
• DOI: 10.1016/j.nuclphysa.2019.05.002

In the present work we systematically study α decay half-lives of Z>51 nuclei using the modified Gamow-like model which includes the effects of the centrifugal potential and electrostatic shielding. For the case of even-even nuclei, this model contains two adjustable parameters: the parameter a related to the screened electrostatic barrier and the radius constant r0, while for the case of odd-odd and odd-A nuclei, it is added a new parameter i.e. hindrance factor h which is used to describe the effect of an odd-proton and/or an odd-neutron. Our calculations can well reproduce the experimental data. In addition, we use this modified Gamow-like model to predict the α-decay half-lives of seven even-even nuclei with Z=120 and some un-synthesized nuclei on their α decay chains.