An Equation-of-Motion Coupled Cluster Singles and Doubles Approach to Auger-Meitner Spectra Based on the One-Center Approximation

18 June 2025, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

A robust and computationally efficient methodology to compute Auger decay rates is presented that combines equation-of-motion coupled cluster singles and doubles two-particle Auger density matrices (also known as two-particle Dyson matrices) with precalculated bound-continuum integrals from atomic calculations, known as the one-center approximation. Illustrative applications include KLL Auger electron spectra (AES) of several small and medium-sized molecules.

Keywords

X-ray spectroscopy
Coupled Cluster Theory
Equation of Motion
Auger Decay
One-center approximation
Core-valence separation

Supplementary materials

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Description
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Supplementary Information
Description
SI includes Table data with core-ionization potentials, partial decay widths and molecular geometries.
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