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  • Open Access

Impact of electron correlation on photoelectron angular distributions in sequential double photoionization of Ne+

Holly Lavery, Andrew C. Brown, and Hugo W. van der Hart

  • Centre for Light-Matter Interactions, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, Northern Ireland

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Phys. Rev. A 112, 063102 – Published 1 December, 2025

DOI: https://doi.org/10.1103/rwhj-df31

Abstract

We present a combination of the R-matrix theory with time dependence (RMT) method with density matrix theory to model sequential ionization processes. Separate RMT calculations model the individual ionization stages, while a density matrix describes the coherences within the intermediate ion. As proof of concept, we quantify changes in the angular distribution of photoelectrons in the final stage of sequential ionization of Ne+ to Ne3+ by x-ray free-electron laser radiation with photon energies of 95 eV.

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Phys. Rev. A 112, 063102– Published 1 December, 2025
  • Received 27 June 2025
  • Accepted 3 November 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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