标题： 非局部效应在双势方法中偶-偶核$α$衰变半衰期中的影响 显示英文标题

标题： Nonlocality effect in $α$ decay half-lives for even-even nuclei within a two potential approach

摘要： 在本文中，我们仔细研究了196个偶-偶核的$\alpha$衰变半衰期，采用了一种通过考虑α粒子的有效质量随坐标变化而改进的双势方法。 结果表明，考虑到α粒子的有效质量后，该模型的准确性得到了提高。 此外，考虑到从三个质量模型得出的$\alpha$衰变能，即Weizsacker-Skyrme-4（WS4）质量模型、相对论连续Hartree-Bogoliubov理论质量模型和FRDM（2012），我们将此模型扩展以预测Z = 118和120同位素的$\alpha$衰变半衰期。 最后，我们仔细研究了预测的Z = 118和120同位素的$\alpha$衰变能和半衰期，并讨论了超重核的壳结构。 我们发现，在WS4质量模型和FRDM(2012)中，N = 178和N = 184处的壳效应明显，而在相对论连续Hartree-Bogoliubov理论质量模型中，壳效应仅在N = 184处明显。 显示英文摘要

摘要： In this paper, we carefully look at the $\alpha$ -decay half-lives of 196 even-even nuclei using a two-potential approach that is made better by taking into account an alpha particle's effective mass that changes with coordinates. The result shows that the accuracy of this model has been improved after considering effective mass for the alpha particle. Furthermore, considering $\alpha$ decay energies derived from three mass models, namely the Weizsacker-Skyrme-4 (WS4) mass model, the relativistic continuum Hartree-Bogoliubov theory mass model, and the FRDM (2012), we extend this model to predict the $\alpha$ -decay half-lives of Z = 118 and 120 isotopes. Finally, we carefully study the predicted $\alpha$ decay energies and half-lives of Z = 118 and 120 isotopes and discuss the shell structure of superheavy nuclei. We found that the shell effect is obvious at N = 178 and at N = 184 in the WS4 mass model and FRDM(2012), while the shell effect is only obvious at N = 184 in the relativistic continuum Hartree-Bogoliubov theory mass model.