Systematic study ofαdecay half-lives within the Generalized Liquid Drop Model with various versions of proximity energies  

作　　者：Jun-Gang Deng Hong-Fei Zhang 邓军刚;张鸿飞(School of Nuclear Science and Technology,Lanzhou University,730000 Lanzhou,China;Joint Department for Nuclear Physics,Institute of Modern Physics,CAS and Lanzhou University,730000 Lanzhou,China;Engineering Research Center for Neutron Application,Ministry of Education,Lanzhou University,730000 Lanzhou,China)

机构地区：[1]School of Nuclear Science and Technology,Lanzhou University,730000 Lanzhou,China [2]Joint Department for Nuclear Physics,Institute of Modern Physics,CAS and Lanzhou University,730000 Lanzhou,China [3]Engineering Research Center for Neutron Application,Ministry of Education,Lanzhou University,730000 Lanzhou,China

出　　处：《Chinese Physics C》2021年第2期441-458,共18页中国物理C（英文版）

基　　金：Support by National Natural Science Foundation of China(10775061,11175054,11675066,11665019,11947229);the Fundamental Research Funds for the Central Universities(lzujbky-2017-ot04,lzujbky-2020-it01);Feitian Scholar Project of Gansu province。

摘　　要：It is universally acknowledged that the Generalized Liquid Drop Model(GLDM)has two advantages over otherαdecay theoretical models:introduction of the quasimolecular shape mechanism and proximity energy.In the past few decades,the original proximity energy has been improved by numerous works.In the present work,the different improvements of proximity energy are examined when they are applied to the GLDM for enhancing the calculation accuracy and prediction ability ofαdecay half-lives for known and unsynthesized superheavy nuclei.The calculations ofαhalf-lives have systematic improvements in reproducing experimental data after choosing a more suitable proximity energy for application to the GLDM.Encouraged by this,theαdecay half-lives of even-even superheavy nuclei with Z=112-122 are predicted by the GLDM with a more suitable proximity energy.The predictions are consistent with calculations by the improved Royer formula and the universal decay law.In addition,the features of the predictedαdecay half-lives imply that the next double magic nucleus after ^(208)Pb is ^(298)Fl.

关 键 词：αdecay superheavy nuclei Generalized Liquid Drop Model proximity energy 

分 类 号：O571.321[理学—粒子物理与原子核物理]