相对论平均场理论框架下对能的系统研究  

A systematic study on nuclear pairing energy under the relativistic mean-field model

作　　者：丁斌刚[1] 张大立[1] 鲁定辉[2] 

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

出　　处：《物理学报》2009年第9期6086-6090,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10675046)资助的课题~~

摘　　要：在相对论平均场模型的框架内,沿原子核的稳定线,以每隔4个质子或中子提取样本的方法,计算了核谱图上数十个原子核的对能,特别是研究了氧同位素偶-偶核的对能随核子数的变化规律,发现在固定能隙Δ的条件下,对能的大小和核的壳结构有关,由此提出了一种检验闭壳效应的简便方法,进而发现中子数N=6不仅在轻核的丰中子区是一个新幻数,而且在丰质子区也是一个可能的新幻数.Nuclear pairing energy of dozens of atomic nuclei in nuclear period chart are calculated along the stable line by extracting the swatch at a proton or neutron number interval of 4. Especially, we have studied the rule of pairing energy of the even-even nuclei of O isotopes changing with nucleon number under the relativistic mean-field model, and found, when energy gap Δ is fixed, the magnitude of nuclear pairing energy is related to nuclear shell structure. Thereof we propose a simple method to test closed shell, and further, we conclude that the neutron number N = 6 is a new magic number not only in neutron-rich region, but also in proton-rich region of light nuclei.

关 键 词：相对论平均场模型 对能 能隙 幻数 

分 类 号：O571[理学—粒子物理与原子核物理]