Abstract

We calculate various differential and double differential characteristics of ionization by a single photon for H⁻, He and for the two-electron ions with Z = 3, 4, 5 in the region of the so-called quasi-free mechanism (QFM) domination. We employ highly accurate wave functions at the electron-electron coalescence line where coordinates of both ionized electrons coincide. We trace the Z dependence of the double differential distributions. For all considered targets we discuss the dependence of the photoelectron energy distribution on the photon energy. Our calculation demonstrated the rapid decrease of QFM contribution with increase of the difference in energy of two outgoing electrons, and with decrease of the angle between two outgoing momenta. As a general feature, we observe the decrease of QFM contribution with nuclear charge growth.

Graphical abstract

中文翻译：

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小反冲力矩通过高能光子使He和二电子离子双重电离

摘要

我们通过对h的单光子计算电离的各种差和双差分特性^-，He和用于两个电子离子与Ž 在所谓的自由准机构的区域= 3，4，5（QFM）支配。我们在两个离子化电子的坐标重合的电子-电子结合线上采用了高精度的波函数。我们追踪Z双微分分布的依赖性。对于所有考虑的目标，我们讨论了光电子能量分布对光子能量的依赖性。我们的计算表明，随着两个出射电子能量差的增加以及两个出射矩之间的夹角的减小，QFM贡献迅速减小。作为一般特征，我们观察到QFM的贡献随着核电荷的增长而降低。

图形概要