Abstract

We study the photoionization of the s states in the systems bound by sufficiently weak central fields V(r) for the large photon energies corresponding to the relativistic photoelectrons. We demonstrate that the energy dependence of the photoionization cross section can be obtained without solving the wave equation. We show that the shape of the energy dependence of the cross section is determined by analytical properties of the binding potential V(r). We find the cross sections for the potentials V(r) which have singularities in the origin, on the real axis and in the complex plane.

Graphical abstract

中文翻译：

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中心场中s态的相对论光效应

摘要

我们研究了对应于相对论光电子的大光子能量的，由足够弱的中心场V（r）约束的系统中s态的光电离。我们证明，无需求解波动方程即可获得光电离截面的能量依赖性。我们表明，截面的能量依赖性的形状是由结合势V（r）的分析性质确定的。我们找到了在原点，实轴和复平面上具有奇异点的电势V（r）的横截面。

图形概要