a-Decay half-life screened by electrons

In this paper, by considering the electrons in dif-ferent external environments, including neutral atoms, a metal, and an extremely strong magnetic-field environment, the screened a-decay half-lives of the a emitters with proton number Z = 52–105 are systematically calculated. In the external environment, the decay energy and the interaction potential between a particle and daughter nucleus are both changed due to the electron screening effect and their vari-ations are both very important for the electron screening effect. Besides, the electron screening effect is found to be closely related to the decay energy and its proton number.