论文标题
计算地面和激发钠状态的接近阈值光吸收
Calculation of the near threshold photoabsorption for the ground and excited sodium states
论文作者
论文摘要
我们从Na的基态重新访问了光的光吸收，结束了电离阈值下方和之上，特别强调了库珀最小值周围光电离截面的形状。当前的处理使用自一致的中央场以及包括核心极化效应，匹配和改进的其他计算结果。还可以计算出激发$ 4s，$ 3p $和$ 3D $状态的光吸收，以及相应的光振荡器强度。将结果与所有已发表的实验性和理论数据中最具代表性的结果进行了比较。比较证实了某些测量结果的结果，但对他人的有效性引起了严重的关注。在基态的情况下，持续的分歧是唯一一项超过55年的可用实验测量，这表明了对新的，精制的，测量的需求。
We revisit the photoabsorption from the ground state of Na, ending below and above the ionization threshold, with special emphasis on the shape of the photoionization cross section around the Cooper minimum. The present treatment, using a self-consistent central field and including core polarization effects, matches and improves over the results of other recent calculations. The photoabsorption from the excited $4s,$ $3p$, and $3d$ states is also calculated, along with the corresponding optical oscillator strengths. The results are compared with all published experimental and with the most representative of the theoretical data. The comparisons confirm the results of some of the measurements, but raise serious concerns about the validity of others. The continuing disagreement in the case of the ground state with the only one available experimental measurement, that is over 55 years old, points to the needs for new, refined, measurements.
