Influence of the Coulomb exchange term on nuclear single-proton resonances

作     者：Shu-Yang Wang Zhong-Lai Zhu Zhong-Ming Niu 

作者机构：School of Physics and Materials Science Anhui University 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2016年第27卷第5期

页      面：231-237页

核心收录：

学科分类：08[工学] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 

基　　金：partly supported by the National Natural Science Foundation of China(No.11205004) the Key Research Foundation of Education Ministry of Anhui Province of China(No.KJ2016A026) 

主　　题：共振能量 库仑场 交换项 质子数 相对论平均场模型 共振宽度 中子数 非定域性 

摘      要：Nuclear single-proton resonances are sensitive to the Coulomb field,while the exchange term of Coulomb field is usually neglected due to its *** combining the complex scaling method with the relativistic mean-field model,the influence of the Coulomb exchange term on the single-proton resonances is investigated by taking Sn isotopes and N=82 isotones as *** is found that the Coulomb exchange term reduces the singleproton resonance energy within the range of 0.4-0.6 MeV and leads to similar isotopic and isotonic trends of the resonance energy as those without the Coulomb exchange ***,the single-proton resonance width is also reduced by the Coulomb exchange term,whose influence generally decreases with the increasing neutron number and increases with the increasing proton ***,the influence of the Coulomb exchange term cannot change the trend of the resonance width with respect to the neutron number and proton ***,the influence of the Coulomb exchange term on the resonance width is investigated for the doubly magic nuclei ^(40)Ca,^(56,78)Ni,^(100,132)Sn,and ^(208)*** is found that the Coulomb exchange term reduces the proton resonance width within 0.2 MeV,whose magnitude depends on the specific nucleus and the quantum numbers of resonant states.