Ground-state energy of beryllium atom with parameter perturbation method  

作　　者：Feng Wu LijuanMeng 吴锋;孟丽娟(Department of Physics, Yancheng Institute of Technology)

机构地区：Department of Physics,Yancheng Institute of Technology,Yancheng 224051,China

出　　处：《Chinese Physics B》2018年第9期237-240,共4页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11647071);the Natural Science Foundation of Jiangsu Province,China(Grant No.BK20160435)

摘　　要：We present a perturbation study of the ground-state energy of the beryllium atom by incorporating double parameters in the atom＇s Hamiltonian. The eigenvalue of the Hamiltonian is then solved with a double-fold perturbation scheme,where the spin-spin interaction of electrons from different shells of the atom is also considered. Calculations show that the obtained ground-state energy is in satisfactory agreement with experiment. It is found that the Coulomb repulsion of the inner-shell electrons enhances the effective nuclear charge seen by the outer-shell electrons, and the shielding effect of the outer-shell electrons to the nucleus is also notable compared with that of the inner-shell electrons.We present a perturbation study of the ground-state energy of the beryllium atom by incorporating double parameters in the atom＇s Hamiltonian. The eigenvalue of the Hamiltonian is then solved with a double-fold perturbation scheme,where the spin-spin interaction of electrons from different shells of the atom is also considered. Calculations show that the obtained ground-state energy is in satisfactory agreement with experiment. It is found that the Coulomb repulsion of the inner-shell electrons enhances the effective nuclear charge seen by the outer-shell electrons, and the shielding effect of the outer-shell electrons to the nucleus is also notable compared with that of the inner-shell electrons.

关 键 词：parameter perturbation method double-fold perturbation scheme ground-state energy 

分 类 号：O562[理学—原子与分子物理]