# Doubly differential cross sections for ionization of lithium atom by protons and O$^{8+}$ ions

## TL;DR

This paper calculates doubly differential cross sections for lithium atom ionization by protons and O$^{8+}$ ions using a relativistic non-perturbative approach, comparing results with recent experimental data and theoretical models.

## Contribution

It introduces a relativistic non-perturbative method for calculating ionization cross sections and compares these with recent experimental and theoretical results.

## Key findings

- Good agreement with recent measurements
- Highlights the importance of relativistic effects
- Provides a new computational approach

## Abstract

We consider single ionization of lithium atom in collisions with $p$ and O$^{8+}$ projectiles. Doubly differential cross sections for ionization are calculated within a relativistic non-perturbative approach. Comparisons with the recent measurements and theoretical predictions are made.