X-Ray Transitions from Antiprotonic Noble Gases

TL;DR

This study uses advanced calculations to analyze antiprotonic X-ray transitions and electronic X-ray emissions in noble gases, revealing details of ionization and atomic de-excitation processes during antiprotonic cascades.

Contribution

It provides a detailed theoretical analysis of antiprotonic X-ray transitions and electronic X-ray emissions in noble gases using Multiconfiguration Dirac-Fock calculations, highlighting shell ionization dynamics.

Findings

Identification of high principal quantum number X-ray transitions.

Correlation between electronic X-ray lines and antiprotonic atom states.

Insights into shell-by-shell ionization during antiprotonic cascades.

Abstract

The onset of antiprotonic X-ray transitions at high principal quantum numbers and the occurence of electronic X-rays in antiprotonic argon, krypton, and xenon has been analyzed with the help of Multiconfiguration Dirac-Fock calculations. The shell-by-shell ionisation by Auger electron emission, characterised by appearance and disappearance of X-ray lines, is followed through the antiprotonic cascade by considering transition and binding energies of both the antiproton and the remaining electrons. Electronic lines could be attributed partly to specific states of the antiprotonic atom de-excitation.