Resonant Continuum in Extended RMF Plus BCS Approximation  

作　　者：CAOLi-Gang MAZhong-Yu 

机构地区：[1]InstituteofHighEnergyPhysics,theChineseAcademyofSciences,Beijing100039,China [2]ChinaInstituteofAtomicEnergy,Beijing102413,China

出　　处：《Communications in Theoretical Physics》2004年第4期583-586,共4页理论物理通讯（英文版）

基　　金：国家自然科学基金，国家重点基础研究发展计划(973计划)

摘　　要：The contribution of the resonant continuum to pairing correlations is investigated in the relativistic mean field theory plus Bardeen–Cooper–Schrieffer (BCS) approximation with a constant pairing strength. The resonance states with their widths in the continuum are considered explicitly. The numerical study is performed in an effective Lagrangian with the parameter set NLSH for neutron-rich nucleus <SUP>84</SUP>Ni. The results show that the effect of the proper treatment of the resonant continuum on pairing correlations for nucleus close to neutron drip line is important. It is found that the problem of an unphysical particle gas could be overcome when the pairing correlation is performed by using the resonant states instead of the discretized states in the continuum.

关 键 词：resonant continuum relativistic mean-field pairing correlations 

分 类 号：O571.2[理学—粒子物理与原子核物理]