CORRELATION EFFECTS IN ATOMIC STRUCTURE USING THE RANDOM-PHASE APPROXIMATION,
CORRELATION EFFECTS IN ATOMIC STRUCTURE USING THE RANDOM-PHASE APPROXIMATION,
复制标题
使用随机相位近似的原子结构中的相关效应，
DOI：
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发表时间：
1964
期刊：
影响因子：
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通讯作者：
A. Glassgold
中科院分区：
文献类型：
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作者：
P. Altick;A. Glassgold
摘要：介绍了一种处理原子结构关联的方法，并将其应用于激发能、振子强度和光电离截面的计算。该方法是Hartree-Fock理论的扩展，被称为随机相位近似，它已经被应用于许多其他多体问题。在原子物理学的应用中，给出了元素周期表第二列中下列原子的结果：铍、镁、钙和锶。这些原子都有1子S基态，只考虑1子P态的激发。研究的总体结论是，关联对振子强度和光电离截面的影响很大，而对激发能的影响很小。只要与实验比较是可能的，包括这些相关性提高理论和实验之间的协议。然而，它们的影响并不像在高度简并的无限系统或原子核中那样显著。（作者）
Abstract : A procedure for treating correlations in atomic structure is introduced and applied to the calculation of excitation energies, oscillator strengths, and photo-ionization cross sections. The method is the extension of the Hartree-Fock theory known as the random-phase approximation, which has already been applied to a number of other many-body problems. In this application to atomic physics, results are given for the following atoms in column II of the periodic table: beryllium, magnesium, calcium, and strontium. These atoms all have 1 sub S ground states, and only excitations to 1 sub P states are considered. The general conclusion of the study is that the values of the oscillator strengths and photo-ionization cross sections are changed significantly by the correlations, while the changes in the values of the excitation energies are quite small. Wherever comparison with experiment is possible, the inclusion of these correlations improves the agreement between theory and experiment. Their effects are, however, not as marked as in highly degenerate infinite systems or in nuclei. (Author)