Normal Auger processes with ultrashort x-ray pulses in Neon

TL;DR

This paper presents a theoretical model to study how ultrashort x-ray pulses influence Auger decay processes in Neon, revealing effects on electron spectra and the conditions under which normal Auger lineshape is recovered.

Contribution

It introduces a new theoretical framework to analyze the impact of ultrashort x-ray pulses on Auger decay in Neon, highlighting pulse duration and intensity effects.

Findings

Effects in Auger-photoelectron coincidence spectrum due to pulse parameters

Normal Auger line-shape recovered in integrated electron spectrum

Pulse duration and intensity influence spectral modifications

Abstract

Modern x-ray sources enable the production of coherent x-ray pulses with a pulse duration in the same order as the characteristic lifetimes of core-hole states of atoms and molecules. These pulses enable the manipulation of the core-hole population during Auger decay processes, modifying the lineshape of the electron spectra. In this work, we present a theoretical model to study those effects in Neon. We identify effects in the Auger-photoelectron coincidence spectrum due to the duration and intensity of the pulses. The normal Auger line-shape is recovered in Auger electron spectrum integrated over all photoelectron energies.