Forward electron emission in collisions of He2+ ions with Ar atoms with simultaneous capture of two electrons

L. Sarkadi and D. Nagy
Phys. Rev. A 94, 042709 – Published 31 October 2016

Abstract

The energy spectrum of the electrons ejected in forward direction from Ar atoms with simultaneous bound-state capture of two electrons has been measured by impact of 30 keV/amu He2+ ions with the aim to clarify the discrepancy between the results of two previous experiments concerning the existence of the cusp-shaped peak for electrons with velocity close to the ion velocity. A peak structure has been observed which is dominated by a broad cusp attributed to the zero-energy electron emission in the projectile-centered reference system at the 2S3 excitation threshold of He0. Further narrower peaks have been identified as results of the decay of autodetachment resonant states of He populated during the collision by three-electron bound-state capture.

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  • Received 29 August 2016

DOI:https://doi.org/10.1103/PhysRevA.94.042709

©2016 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

L. Sarkadi* and D. Nagy

  • Institute for Nuclear Research of the Hungarian Academy of Sciences (MTA Atomki), P.O. Box 51, H-4001 Debrecen, Hungary

  • *sarkadil@atomki.hu

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Issue

Vol. 94, Iss. 4 — October 2016

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