重核自发裂变寿命的新公式  

New Formula for Spontaneous Fission Half-Lives of Heavy Nuclei

作　　者：许昌[1] 任中洲[1,2] 王再军[1] 

机构地区：[1]南京大学物理系 [2]兰州重离子加速器国家实验室原子核理论中心兰州730000

出　　处：《高能物理与核物理》2005年第7期673-676,共4页High Energy Physics and Nuclear Physics

基　　金：国家杰出青年基金(10125521);教育部博士点基金(20010284036);国家重点基础研究发展规划项目(G2000077400);中国科学院创新工程重点项目(KJCX2SWN02)资助~~

摘　　要：利用Swiatecki寿命公式及其推广形式系统计算了重核的自发裂变寿命,并提出一个新的四参数自发裂变寿命公式,公式计算结果和实验数据能够很好地符合.对于Z≥90的重核存在一条N=Z+52的长寿命线.新公式可以预言长寿命线附近的重核自发裂变寿命.Systematic calculations on spontaneous fission half-lives of heavy nuclei are carried out by Swiatecki's formula with renewed parameters and by its generalized form. A new formula with only four parameters is proposed for spontaneous fission half-lives. Experimental half-lives are well reproduced by the three formulae. We have found from systematics of available data that there is a long lifetime line of spontaneous fission N = Z + 52 for heavy elements with Z > 90. The new formula can be used to predict the spontaneous fission half-lives of heavy nuclei not far away from this long lifetime line.

关 键 词：自发裂变 新公式 重核 系统计算 推广形式 实验数据 计算结果 长寿命 四参数 

分 类 号：O571[理学—粒子物理与原子核物理]