Ground-state energy of beryllium atom with parameter perturbation method

• 来源期刊: 中国物理B（英文版）
• 关键词: parameter perturbation method double-fold perturbation scheme ground-state energy
• 年，卷（期）: 2018,（9）
• 页码范围: 267-271
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/9/093101

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.