Excitation Energies of 1s^2 ns (6 ≤ n ≤ 9) States for Lithium-Like Systems from Z = 11 to 20 |
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作者姓名: | 胡木宏 王治文 |
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作者单位: | PhysicsDepartment,LiaoningNormalUniversity,Dalian116029 |
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摘 要: | The non-relativistic energies of 1s^2 ns (6 ≤ n ≤ 9) states for the lithium-like systems from Z = 11 to 20 are calculated by using a full-core-plus-correlation (FCPC) method. The relativistic and mass-polarization effects on the energy are calculated by the first-order perturbation corrections. The correction from the quantumelectrodynamics effect is also included using effective nuclear charge. Based on these results and the quantum defect theory, the quantum defects of 1s^2ns series for these ions, as a function of energy, are determined. The comparisons between the ionization potentials for 1s^2ns states (6 ≤ n ≤ 9) obtained by the FCPC method and the semi-empirical method are carried out. The results show that their agreement is very well and the energies of all discrete states (n ≥ 10) below the ionization threshold of this series for the ions can be predicted by using their quantum defects.
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关 键 词: | 激发能量 锂原子-相系统 能级计算 质量偏振效应 四-核-加-关联法 |
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