Abstract

Recently, there have been published the results of unique experiments on measuring the fully differential cross sections of the Compton single ionization of the helium atom near the ionization threshold at a photon energy of a few keV. This opens up a possibility of using Compton ionization along with the ionization of atoms/molecules by fast charged particles to study characteristics of the ionization processes in more detail, since photons are neutral particles. In this regard, the paper deals with the ionization cross sections of the reaction (γ, γe) at the hydrogen atom, because the theoretical description of this reaction at the hydrogen atom does not need to consider a number of additional assumptions and approximations inherent in heavier atoms. Special attention is paid to the study of the kinematic region of the reaction near threshold, where it is expected to obtain a valuable information about the initial and final states of the target. The contribution of corrections to the first Born approximation due to the electron boundness is also discussed.

Graphical abstract

中文翻译：

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在几个keV能量范围内的光子在阈值附近使氢原子的Compton电离：非相对论方法

摘要

最近，已经发表了一些独特实验的结果，这些结果是在几keV的光子能量下，在电离阈值附近测量氦原子的康普顿单电离的完全差分截面。由于光子是中性粒子，因此开辟了一种可能性，即可以使用康普顿电离以及快速充电的粒子对原子/分子的电离来更详细地研究电离过程的特性。在这方面，本文涉及反应的电离截面（γ，γe在氢原子上），因为对该反应在氢原子上的理论描述不需要考虑重原子固有的许多其他假设和近似。应特别注意接近阈值的反应运动区域的研究，在该区域中有望获得有关目标初始状态和最终状态的有价值的信息。还讨论了由于电子束缚而对第一玻恩近似的校正的贡献。

图形概要