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Excitation function of detachment with simultaneous target ionization in slow collisions of D− with He and Ar

M. Schulz1,2, F. Herrmann1, W. Zhang1, A. B. Voitkiv3, B. Najjari1,4, M. Siddiki1, A. Dorn1, M. Grieser1, F. Grussie1 et al.

H. Kreckel1, O. Novotny1, A. Wolf1, T. Pfeifer1, C. D. Schröter1, and R. Moshammer1

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Phys. Rev. A 114, 022823 – Published 25 August, 2026

DOI: https://doi.org/10.1103/tmdp-7g9p

Abstract

We have measured momentum analyzed electrons and singly charged recoil ions ejected in slow collisions of D− ions with He and Ar in triple coincidence with neutralized projectiles. From the data, we extracted relative triple differential cross sections for detachment and detachment with simultaneous target ionization as a function of projectile energy. The results were compared with our perturbative calculations. At large projectile energies, we observed signatures of a nonsequential process, in which the electrons are ejected from the projectile and the target by a single mutual interaction. We find that contributions from sequential processes are important as well and, at small energies, even dominant.

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Phys. Rev. A 114, 022823– Published 25 August, 2026
  • Received 14 May 2026
  • Accepted 5 August 2026
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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. Open access publication funded by Max Planck Society.

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