摘要
探索滴线区弱束缚核的性质对核物理研究具有重要意义。基于谐振子基的传统壳模型无法合理地处理弱束缚性质。在本研究中,使用包含连续态的Gamow壳模型。基于手征两体及三体核力,使用Gamow Hartree-Fock方法,自洽地构建了包括束缚态、共振态和非共振连续态的Berggren基矢。最近的实验结果确认了^(78)Ni的双幻性质,这使得对丰中子镍同位素能量的计算成为可能。本工作从79Ni的计算出发,研究了更丰中子镍同位素的低能级结构。结果揭示了连续态效应的重要性,并对镍链的中子滴线位置做出预测。这些计算对于理解天体物理中的核合成过程具有重要作用。
Exploring the properties of weakly bound nuclei in the dripline region is of great significance to nuclear physics research.Traditional shell models based on harmonic oscillator bases cannot treat reasonably the weakly-bound nature.In this study,we use the Gamow shell model which includes the continuum.Based on a chiral two-plus three-nucleon force,using the Gamow Hartree-Fock method,we self-consistently construct Berggren bases that include bound states,resonant states and non-resonant continuum states.Recent experimental results have confirmed the double magic nature of^(78)Ni,making it possible to calculate the energy of neutron-rich nickel isotopes.This paper begins with the 79Ni calculation and investigates the low-energy structure of neutron-richer nickel isotopes.The results reveal the importance of the continuum effect and also predict the position of the neutron dripline of the nickel chain.These calculations should be useful in understanding the nucleosynthesis process in astrophysics.
作者
程泽华
李健国
马远卓
张爽
许志成
许甫荣
CHENG Zehua;LI Jianguo;MA Yuanzhuo;ZHANG Shuang;XU Zhicheng;XU Furong(School of Physics,and State Key Laboratory of Nuclear Physics and Technology,Peking University,Beijing 100871,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China)
出处
《原子核物理评论》
北大核心
2025年第2期205-209,共5页
Nuclear Physics Review
基金
国家自然科学基金资助项目(11921006,12035001,12105106,12205340,12335007)
甘肃省自然科学基金资助项目(22JR5RA123)。
关键词
手征有效场论核力
三体力
Gamow壳模型
镍同位素
chiral effective field theory force
three-nucleon force
gamow shell model
nickel isotopes
