# Calculations for electron-impact ionization of magnesium and calcium atoms in the method of interacting configurations in the complex number representation

## TL;DR

This paper develops a complex number configuration interaction method to calculate electron-impact ionization characteristics of magnesium and calcium atoms, including energies and autoionizing state widths, advancing atomic collision theory.

## Contribution

It introduces a novel application of the interacting configurations method in complex number representation for multi-electron atom ionization calculations.

## Key findings

- Calculated energies and widths of autoionizing states for Mg and Ca
- Provided results on photoionization of Be ion autoionizing states
- Enhanced understanding of electron-impact ionization processes

## Abstract

Next investigations in our program of transition from the He atom to the complex atoms description have been presented. The method of interacting configurations in the complex number representation is under consideration. The spectroscopic characteristics of the Mg and Ca atoms in the problem of the electron-impact ionization of these atoms are investigated. The energies and the widths of the lowest autoionizing states of Mg and Ca atoms are calculated. Few results in the photoionization problem on the autoionizing states above the n=2 threshold of helium-like Be ion are presented.