# Absolute cross sections of ultra-soft x-ray radiation in at electron scattering upon atoms and the soft-photons approximation

## TL;DR

This paper presents theoretical calculations of ultra-soft x-ray bremsstrahlung cross sections during electron scattering on Ar, Kr, and Xe, aligning well with experimental measurements at 600 eV.

## Contribution

The study provides a theoretical approach to calculate ultra-soft x-ray bremsstrahlung cross sections that agree with experimental data for noble gases.

## Key findings

- Calculated cross sections match experimental data
- Results confirm the validity of the theoretical model
- Applicable to electron energies around 600 eV

## Abstract

The cross sections of ultra-soft x-ray bremsstrahlung in at electron scattering by Ar, Kr and Xe are theoretically calculated. The results are consistent with the absolute values of the differential cross sections measured by Gnatchenko et al [Phys. Rev. A 80, 022707 (2009)] for scattering electrons with an energy of 600 eV on these atoms.