Many-body correlations in shell model effective interactions derived by ab initio methods and the V_(low-k) approach

作     者：王小保 董国香 王华磊 袁岑溪 陈永静 图雅 Xiao-Bao Wang;Guo-Xiang Dong;Hua-Lei Wang;Cen-Xi Yuan;Yong-Jing Chen;Ya Tu

作者机构：School of Science Huzhou University School of Physics and Engineering Zhengzhou University Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen University Key Laboratory of Science and Technology on Nuclear Data China Institute of Atomic Energy School of Physics Science and Technology Shenyang Normal University 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2018年第42卷第11期

页      面：78-84页

核心收录：

学科分类：0709[理学-地质学] 08[工学] 0708[理学-地球物理学] 0804[工学-仪器科学与技术] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 0703[理学-化学] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：Supported by National Natural Science Foundation of China(11505056,U1732138,11605054,11790325,11305108,11575290,11675148,11747312,11775316) the Outstanding Young Talent Research Fund of Zhengzhou University(1521317002) 

主　　题：shell model effective interactions tensor force three-body force 

摘      要：We investigate many-body correlations caused by two- and three-body （2-, 3bd） forces. Shell-model effective interactions derived from ab initio methods （coupled-cluster method, no-core shell model） are adopted. Vlow-k potentials, based on many-body perturbation theory, are also tested, especially for their cut-off dependence. We compare the central, tensor and spin-orbit interactions from microscopic theory to the fitted interactions. After the inclusion of the three-body force, the matrix elements become fairly close to those fitted directly to experimental data. Calculations of neutron-rich oxygen isotopes are performed, to clarify the effects of 3bd forces, tensor, and spin-orbit interactions on the nuclear binding and excitation energies. We find that the 3bd force can influence the binding energies greatly, which also determines the drip line position, while its effect on excitation energies is not very pronounced. The spin-orbit force, which is part of the 2bd force, can affect the shell structure explicitly, at least for neutron-rich systems.