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.
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)
出处
《原子核物理评论》
CAS
CSCD
北大核心
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)~~
关键词
超重核
半衰期
Α衰变
自发裂变
superheavy nuclei
half-life
α decay
spontaneous fission
