中国物理B ›› 2005, Vol. 14 ›› Issue (12): 2444-2450.doi: 10.1088/1009-1963/14/12/013

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Investigation on the deformation of Ne and Mg isotope chains within relativistic mean-field model

王庭太1, 任中洲2, 蔡翔舟3, 马余刚3, 方德清3, 钟晨3, 田文栋3, 沈文庆3, 陈金根4, 魏义彬5, 郭威5, 王鲲5, 马国亮5, 陈金辉5, 颜廷志5, 左嘉旭5, 马春旺5, 周星飞6   

  1. (1)Department of Mathematics and Physics,Zhongyuan Institute of Technology,450007, China; (2)Department of Physics, Nanjing University, Nanjing 210008, China; (3)Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; (4)Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;College of Science, Zhejiang Forestry University, Hangzhou 311300, China ;Graduate School of the Chinese Academy of Sciences, Beijing 100039, China; (5)Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;Graduate School of the Chinese Academy of Sciences, Beijing 100039, China; (6)Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;Graduate School of the Chinese Academy of Sciences, Beijing 100039, China;College of Sciences, Ningbo University, Ningbo 315211, China
  • 收稿日期:2005-01-26 修回日期:2005-06-20 出版日期:2005-12-20 发布日期:2005-12-20
  • 基金资助:
    Project supported by the Major State Basic Research Development Program of China (Grant No G2000077404), the National Natural Science Foundation of China (Grant Nos 10125521, 10475108, 10405032 and 10328259), the Fund of the Education Ministry of China (Grant No 20010284036) and the Shanghai Phosphor Program (Grant No 03 QA 14066).

Investigation on the deformation of Ne and Mg isotope chains within relativistic mean-field model

Chen Jin-Gen (陈金根)abc, Cai Xiang-Zhou (蔡翔舟)a, Wang Ting-Tai (王庭太)d, Ma Yu-Gang (马余刚)a, Ren Zhong-Zhou (任中洲)e, Fang De-Qing (方德清)a, Zhong Chen (钟晨)a, Wei Yi-Bin (魏义彬)ac, Guo Wei (郭威)ac, Zhou Xing-Fei (周星飞)acf, Wang Kun (王鲲)ac, Ma Guo-Liang (马国亮)ac, Tian Wen-Dong (田文栋)a, Chen Jin-Hui (陈金辉)ac, Yan Ting-Zhi (颜廷志)ac, Zuo Jia-Xu (左嘉旭)ac, Ma Chun-Wang (马春旺)ac, Shen Wen-Qing (沈文庆)a   

  1. a Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; b College of Science, Zhejiang Forestry University, Hangzhou 311300, China; c Graduate School of the Chinese Academy of Sciences, Beijing 100039, China; d Department of Mathematics and Physics,Zhongyuan Institute of Technology, 450007, Chinae Department of Physics, Nanjing University, Nanjing 210008, Chinaf College of Sciences, Ningbo University, Ningbo 315211, China
  • Received:2005-01-26 Revised:2005-06-20 Online:2005-12-20 Published:2005-12-20
  • Supported by:
    Project supported by the Major State Basic Research Development Program of China (Grant No G2000077404), the National Natural Science Foundation of China (Grant Nos 10125521, 10475108, 10405032 and 10328259), the Fund of the Education Ministry of China (Grant No 20010284036) and the Shanghai Phosphor Program (Grant No 03 QA 14066).

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摘要： Ne and Mg isotope chains are investigated based on constrained calculations in the framework of a deformed relativistic mean-field (RMF) model with the NL075 parameter set. The calculated quadrupole deformation and binding energy are compared with other theoretical results as well as the available experimental data. It shows that the calculated deformations of Ne and Mg with the NL075 are more accurate than those obtained with the NL-SH. It is predicted that ^{19,29,32}Ne and ^{20,31}Mg maybe have a triaxial deformation and ^{25-28}Ne and ^{27-30}Mg exhibit a shape coexistence probably. The closure effect of neutron number N=8 for ^{20}Mg is predicted to be very weak.

关键词: deformation, shape coexistence, binding energy, RMF model, constraint calculation

Abstract: Ne and Mg isotope chains are investigated based on constrained calculations in the framework of a deformed relativistic mean-field (RMF) model with the NL075 parameter set. The calculated quadrupole deformation and binding energy are compared with other theoretical results as well as the available experimental data. It shows that the calculated deformations of Ne and Mg with the NL075 are more accurate than those obtained with the NL-SH. It is predicted that $^{19,29,32}$Ne and $^{20,31}$Mg maybe have a triaxial deformation and $^{25-28}$Ne and $^{27-30}$Mg exhibit a shape coexistence probably. The closure effect of neutron number N = 8 for $^{20}$Mg is predicted to be very weak.

Key words: deformation, shape coexistence, binding energy, RMF model, constraint calculation

中图分类号:  (Nuclear Density Functional Theory and extensions (includes Hartree-Fock and random-phase approximations))

  • 21.60.Jz
21.10.Dr (Binding energies and masses) 27.30.+t (20 ≤ A ≤ 38) 27.20.+n (6 ≤ A ≤ 19)