Shape Coexistence in Neutron-Deficient At Isotopes in Relativistic Mean Field Model  

作　　者：LIANG Jun MA Zhong-yu 

机构地区：[1]Physics Department, Taiyuan University of Technology [2]不详

出　　处：《Annual Report of China Institute of Atomic Energy》2006年第1期64-65,共2页中国原子能科学研究院年报（英文版）

基　　金：National Natural Science Foundation of China (10475116,10535010 and 10235020);Asia-Europe Link in Nuclear Physics and Astrophysics(CN/ASIA-LINK/008(094-791))

摘　　要：The potential energy surfaces are calculated for neutron-deficient At isotopes from A=190 to 207 in an axially deformed relativistic mean field approach with a wide range of β2 deformation, using a quadratic constraint scheme for the first time. We find several minima in the potential energy surfaceThe potential energy surfaces are calculated for neutron-deficient At isotopes from A=190 to 207 in an axially deformed relativistic mean field approach with a wide range of β2 deformation, using a quadratic constraint scheme for the first time. We find several minima in the potential energy surface for each nucleus, shape-coexistence and quadratic deform are discussed. In some At isotopes, the isomeric solutions are very close to one another and can be considered as coexistent shapes. The shape coexistence in At-isotopes can be explained by a simple mean field picture.

关 键 词：中子 核原子 同位素 同质异能素 

分 类 号：O571[理学—粒子物理与原子核物理]