Ab initio Monte Carlo shell model calculations for 7Li and 9Li low-lying spectra  

作　　者：刘朗 

机构地区：[1]School of Science, Jiangnan University

出　　处：《Chinese Physics C》2015年第6期40-44,共5页中国物理C（英文版）

基　　金：Supported by Fundamental Research Funds for the Central Universities(JUSRP1035);National Natural Science Foundation of China(11305077)

摘　　要：The low-lying spectra of7 Li and9Li are investigated within an ab initio Monte Carlo Shell Model（MCSM） employing a realistic potential obtained via the Unitary Correlation Operator Method（UCOM）. The MCSM calculations in a 4-major-shells model space for the binding energy and mass quadrupole moment of7, 9Li show good convergence when the MCSM dimension reaches 20. The excitation energy of the Jπ= 1/2-state for7 Li and the magnetic moments for7, 9Li ground states in the MCSM with a treatment of spurious center-of-mass motion are close to the experimental data. Correct level ordering of Jπ=3/2-and 1/2-states for7, 9Li can be reproduced due to the inclusion of three-body correlations in the MCSM＋UCOM. However, the excitation energy of Jπ=1/2-state for9 Li is not reproduced in the MCSM mainly due to the lack of larger model space.The low-lying spectra of7 Li and9Li are investigated within an ab initio Monte Carlo Shell Model（MCSM） employing a realistic potential obtained via the Unitary Correlation Operator Method（UCOM）. The MCSM calculations in a 4-major-shells model space for the binding energy and mass quadrupole moment of7, 9Li show good convergence when the MCSM dimension reaches 20. The excitation energy of the Jπ= 1/2-state for7 Li and the magnetic moments for7, 9Li ground states in the MCSM with a treatment of spurious center-of-mass motion are close to the experimental data. Correct level ordering of Jπ=3/2-and 1/2-states for7, 9Li can be reproduced due to the inclusion of three-body correlations in the MCSM＋UCOM. However, the excitation energy of Jπ=1/2-state for9 Li is not reproduced in the MCSM mainly due to the lack of larger model space.

关 键 词：lying reproduced excitation shells realistic nuclei inclusion Correlation ordering momentum 

分 类 号：O571[理学—粒子物理与原子核物理]