中子物质中的^3PF2态超流性和微观三体核力效应  

Neutron ^3PF2 superfluidity in neutron matter and the effect of microscopic three-body force

作　　者：崔常喜[1] 左维[2] 

机构地区：[1]中国科学院近代物理研究所,兰州730000 [2]中国科学院研究生院,北京100049

出　　处：《物理学报》2007年第9期5185-5190,共6页Acta Physica Sinica

基　　金：国家自然科学重点基金(批准号:10575119;10235030);中国科学院知识创新工程重要方向性项目(批准号:KJCX3-SYW-N2);国家重点基础研究发展规划项目(批准号:G2000077400);国家科技部重大前期研究专项基金(批准号:2002CAB00200)资助的课题.~~

摘　　要：利用Brueckner-Hartree-Fock(BHF)和BCS理论方法,计算了纯中子物质中处于3PF2态的中子对关联能隙,特别是研究并讨论了微观三体核力对3PF2态中子超流性强弱的影响.结果表明:三体核力显著地增强了中子物质中3PF2态中子超流性;当采用BHF单粒子能谱时,三体核力导致相应的对关联能隙峰值由0.22MeV增大到0.50MeV.The neutron ^3PF2 pairing gap in pure neutron matter has been studied by using the Brueckner-Hartree-Fock（BHF） approach and the BCS theory. We have concentrated our attention on investigating the three-body force effect on the neutron superfluidity in the ^3PF2 channel. The calculated results indicate that the three-body force enhances remarkably the ^3PF2 superfluidity in neutron matter. When adopting the BHF single-particle spectrum, the three-body force turns out to increase the maximum value of the pairing gap from about 0.22MeV to about 0.5MeV.

关 键 词：中子物质 ^3PF2超流性 三体核力 BCS理论 

分 类 号：O572.342[理学—粒子物理与原子核物理]