理论预测超重核^(274-291)Cn和^(266-287)Ds的衰变模式（英文）  

Theoretical Descriptions of Decay Modes in ^(274-291)Cn and ^(266-287)Ds Superheavy Nuclei

作　　者：赵天亮 包小军 ZHAO Tianliang;BAO Xiaojun(Department of Physics,Collaborative Innovation Center for Quantum Effects,and Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education, Hunan Normal University,Changsha 410081,China)

机构地区：[1]湖南师范大学物理系,长沙410081

出　　处：《原子核物理评论》2018年第4期455-462,共8页Nuclear Physics Review

基　　金：National Natural Science Foundation of China(11705055,11475050);Hunan Provincial Natural Science Foundation of China(2018JJ3324);Excellent Youth Fund of Hunan Provincial Education Department(17B154)~~

摘　　要：自发裂变和α衰变是影响超重核稳定性的两个主要因素。为了探索270Ds附近的长寿命的超重核,系统地计算了电荷数在104Z112范围内的α衰变与自发裂变之间的竞争。采用推广的液滴模型和唯象的解析公式计算了α衰变半衰期。基于包括壳效应和同位旋效应的WKB近似方法估算了相同超重核的自发裂变半衰期,进而预测了未知超重核^(274-276,279)Cn与^(267-269)Ds的衰变模式。The stability of superheavy nuclei(SHN) is controlled mainly by spontaneous fission and α decay processes. To investigate whether long lived SHN could really exist around 270Ds, the competition between α decay and spontaneous fission in the region 104 Z 112 are studied systematically. The α decay half-lives are investigated by employing a generalized liquid drop model(GLDM) and phenomenological analytical formula. Calculations of spontaneous fission half-lives for the same SHN are carried out based on the Wenzel-Kramers-Brillouin(WKB) approximation with both the shell effect and the isospin effect included. Decay modes are predicted for the unknown nuclei 274-276,279 Cn and 267-269Ds.

关 键 词：超重核 半衰期 Α衰变 自发裂变 

分 类 号：O571.2[理学—粒子物理与原子核物理]