Deformation dependence of symmetry energy coefficients of nuclei

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• 作者：QiuHong Mo ; Min Liu ; LiChun Cheng…
• 关键词：symmetry energy ; Skyrme energy ; density functional ; nuclear deformation ; Thomas ; Fermi
• 刊名：SCIENCE CHINA Physics, Mechanics & Astronomy
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：58
• 期：8
• 全文大小：701 KB
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• 作者单位：QiuHong Mo (1)
  Min Liu (1)
  LiChun Cheng (2)
  Ning Wang (1)
  
  1. Department of Physics, Guangxi Normal University, Guilin, 541004, China
  2. School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, China
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Chinese Library of Science
  Mechanics, Fluids and Thermodynamics
  Physics
  
• 出版者：Science China Press, co-published with Springer
• ISSN：1869-1927

文摘

Based on the semi-classical Thomas-Fermi approximation together with the Skyrme energy-density functional, we study the deformation dependence of symmetry energy coefficients of finite nuclei. The symmetry energy coefficients of nuclei with mass number A = 40, 100, 150, 208 are extracted from two-parameter parabola fitting to the calculated energy per particle. We find that the symmetry energy coefficients decrease with the increase of nuclear quadrupole deformations, which is mainly due to the isospin dependence of the difference between the proton and neutron surface diffuseness. Large deformations of nuclei can cause the change of the symmetry energy coefficient by about 0.5 MeV and the influence of nuclear deformations on the symmetry energy coefficients is more evident for light and intermediate nuclei.