Effect of time-odd fields on odd-even mass differences of semi-magic nuclei

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• 作者：Kun Yu ; XianRong Zhou ; JiWei Cui ; H. Sagawa
• 关键词：odd ; even staggering ; S1n ; S2n ; Δ n 3 ; and mean square deviations
• 刊名：SCIENCE CHINA Physics, Mechanics & Astronomy
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：59
• 期：5
• 全文大小：799 KB
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• 作者单位：Kun Yu (1)
  XianRong Zhou (1) (2) (3)
  JiWei Cui (4)
  H. Sagawa (5) (6)
  
  1. Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen, 361005, China
  2. Department of Physics, East China Normal University, Shanghai, 200241, China
  3. State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190, China
  4. School of Physics and Optoelectronic Engineering, Xidian University, Xi’an, 710071, China
  5. RIKEN, Nishina Center, Wako, 351-0198, Japan
  6. Center for Mathematics and Physics, University of Aizu, Aizu-Wakamatsu, Fukushima, 965-8580, Japan
  
• 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

The effect of time-odd fields of Skyrme interaction on neutron odd-even mass differences is studied in the framework of axially deformed Skyrme Hartree-Fock (DSHF)+BCS model. To this end, we take into account both the time-even and time-odd fields to calculate the one-neutron and two-neutron separation energies and pairing gaps of semi-magic Ca, Ni, and Sn isotopic chains. In the calculations, a surface-type pairing interaction (IS pairing) and an isospin dependent contact pairing interaction (IS+IV pairing) are adopted on top of Skyrme interactions SLy4, SLy6 and SkM*, respectively. We find that the time-odd fields have in general small effects on pairing gaps, but achieve better agreement with experimental data using SLy4 and Sly6 interactions, respectively. It is also shown that the calculations with IS+IV pairing reproduce the one-neutron separation energies of Sn isotopes better than those with the IS pairing interaction when the contributions of the time-odd fields are included.