镜像核^(13)N-^(13)C和^(15)N-^(15)O中的激发态晕或皮(英文)  

Halo or Skin in the Excited States of Two Couples of Mirror Nuclei^(13)N-^(13)C and ^(15)N-^(15)O

作　　者：陈金根[1] 蔡翔舟[2] 沈文庆[2] 马余刚[2] 任中洲[3] 蒋潍舟[2] 钟晨[2] 魏义彬[2] 郭威[2] 周星飞[2] 马国亮[2] 王鲲[2] 

机构地区：[1]浙江林学院理学院,浙江杭州311300 [2]中国科学院上海原子核研究所,上海201800 [3]南京大学物理系,江苏南京210008

出　　处：《原子核物理评论》2005年第1期11-16,共6页Nuclear Physics Review

基　　金：国家重点基础研究发展规划资助项目(G2000077404);国家自然科学基金资助项目 (10125521 );国家教育部基金资助项目(20010284036);上海启明星基金资助项目(03QA14066)~~

摘　　要：用非线性相对论平均场对两对镜像核13N 13C和15N 15O进行了研究. 发现无论在基态还是激发态, 用两套参数所得的结合能都跟实验值很接近. 计算结果显示13N的第一激发态 (2s1 /2 )和第三激发态(1d5 /2 )各存在一个非束缚的质子晕, 而13C的第三激发态 (1d5 /2 )存在一个弱束缚的中子皮. 另外研究表明, 在另一对镜像核15N 15O的第二激发态 (2s1 /2 )和第一激发态 (2s1 /2 )分别存在一个中子晕和质子皮.Properties of two pairs of mirror nuclei ^(13)N-^(13)C and ^(15)N-^(15)O are investigated by using the nonlinear relativistic mean-field theory. It is found that all the calculated binding energies with two different parameter sets are very close to the experimental ones for both the ground states and the excited states. The calculations show that the first excited state (2s_(1/2)) and the third excited state (1d_(5/2)) in ^(13)N are both unbound resonances with proton halo structure, whereas the third excited state (1d_(5/2)) in ^(13)C is weakly bound with a neutron skin. It is also predicted that there has a proton halo in the second excited state (2s_(1/2)) of ^(15)N as well as a neutron skin in the first excited state (2s_(1/2)) of ^(15)O.

关 键 词：激发态 中子晕 质子 基态 结合能 相对论平均场 ^13C ^15N 显示 

分 类 号：O571[理学—粒子物理与原子核物理] O562[理学—物理]