核子对相互作用的壳效应  

Shell effects of the pairing interaction

作　　者：高业会[1] 丁斌刚[2] 鲁定辉[1] 

机构地区：[1]浙江大学近代物理中心,浙江杭州310027 [2]湖州师范学院理学院,浙江湖州313000

出　　处：《浙江大学学报（理学版）》2008年第3期276-279,284,共5页Journal of Zhejiang University（Science Edition）

基　　金：国家自然科学基金资助项目(10475026,10175052,10235030);教育部博士点基金资助

摘　　要：在引入BCS理论修正的相对论平均场模型下,给出了计算对力强度Gn和Gp的一般公式.通过数值计算,首次揭示了在β稳定线附近的中重核中,对力强度Gn和Gp存在着明显的壳效应,从而提供了一种检验幻数存在与否的新方法.The nucleon-nucleon pairing forces were studied under the relativistic mean-field theory with the paring corrections by BCS approximation. The coupled equations of motion were solved by self-consistency with the inter action parameter set NL3. The gap parameters were fixed by reproducing ground state properties of 50^119 Sn, 58 ^140Ce, and 71^178 Lu. The properties of two medium isotope chains Ca and K and three heavy isotope chains Ce, Pr and Nd were investigated. The results indicated that the strength of the pairing forces Gn and Gp have a strong shell effects for the medium （N=20 and 28） and heavy nuclei （N=82） near theβ stability line, thus a new method to search new magic numbers was provided.

关 键 词：相对论平均场 对力强度 壳效应 

分 类 号：O469[理学—凝聚态物理]