Relativistic calculations of the x-ray emission following the Xe-Bi$^{83+}$ collision

TL;DR

This paper presents relativistic calculations of x-ray emission following Bi$^{83+}$ ion collisions with Xe atoms at 70 MeV/u, analyzing collisional and post-collisional processes and comparing results with experimental data.

Contribution

It introduces a relativistic independent electron model with a coupled-channel approach to accurately predict x-ray emission in heavy ion-atom collisions.

Findings

Theoretical x-ray emission intensities agree with experimental data.

Relativistic effects significantly influence the emission process.

Post-collisional decay processes are quantitatively analyzed.

Abstract

We study the x-ray emission following the collision of a Bi$^{83+}$ ion with a neutral Xe atom at the projectile energy 70 MeV/u. The collisional and post-collisional processes are treated separately. The probabilities of various many-electron processes at the collision are calculated within a relativistic independent electron model using the coupled-channel approach with atomic-like Dirac-Fock-Sturm orbitals. The analysis of the post-collisional processes resulting in the x-ray emission is based on the fluorescence yields, the radiation and Auger decay rates, and allows to derive intensities of the x-ray emission and compare them with experimental data. A reasonable agreement between the theoretical results and the recent experimental data is observed. The role of the relativistic effects is investigated.