Competition between α-decay and β-decay for heavy and superheavy nuclei  

作　　者：圣宗强 舒良萍 孟影 胡继刚 钱建发 

机构地区：[1]School of Science, Anhui University of Science and Technology [2]School of Electronic Science and Applied Physics, Hefei University of Technology

出　　处：《Chinese Physics C》2014年第12期16-24,共9页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(11247001);Natural Science Foundation of the Higher Education Institutions of Anhui Province,China(KJ2012A083 and KJ2013Z066);Fundamental Research Funds for the Central Universities of China(2012HG2Y0004)

摘　　要：In this work, the β-stable region for Z ≥90 is proposed based on a successful binding energy formula.The calculated β-stable nuclei in the β-stable region are in good agreement with the ones obtained by Mo¨ller et al. The half-lives of the nuclei close to the β-stable region are calculated and the competition between α-decay andβ-decay is systematically investigated. The calculated half-lives and the suggested decay modes are well in line with the experimental results. The decay modes are mostly β--decay above the β-stable region. Especially for Z ≤111,all the decay modes are β--decay. Regarding the nuclei above the β-stable region, α-decay and β--decay（α＋β-）can occur simultaneously when Z≥ 112. This is a very interesting phenomenon. The competition between α-decay and β-decay is very complex and drastic below the β-stable region. The predictions for half-lives and decay modes of the nuclei with Z =107–110 are presented in detail.In this work, the β-stable region for Z ≥90 is proposed based on a successful binding energy formula.The calculated β-stable nuclei in the β-stable region are in good agreement with the ones obtained by Mo¨ller et al. The half-lives of the nuclei close to the β-stable region are calculated and the competition between α-decay andβ-decay is systematically investigated. The calculated half-lives and the suggested decay modes are well in line with the experimental results. The decay modes are mostly β--decay above the β-stable region. Especially for Z ≤111,all the decay modes are β--decay. Regarding the nuclei above the β-stable region, α-decay and β--decay（α＋β-）can occur simultaneously when Z≥ 112. This is a very interesting phenomenon. The competition between α-decay and β-decay is very complex and drastic below the β-stable region. The predictions for half-lives and decay modes of the nuclei with Z =107–110 are presented in detail.

关 键 词：DECAY β-stable region HALF-LIFE superheavy nuclei 

分 类 号：O571.3[理学—粒子物理与原子核物理] TS255.3[理学—物理]