Abstract

We have performed kinematically complete experiments on single-electron capture in slow He2+-Ar collisions. Besides the pure capture to the He+ (n = 2) level, capture into the deep He+ ( n= 1) state with simultaneous excitation of another target electron is also observed. In contrast to the pure capture, the total cross section for this two-electron transition decreases with increasing collision energy, and its angular-differential cross section exhibits a much slighter slope. We take these observations as evidence for electron capture mediated by electron-electron interactions.

Department(s)

Physics

Comments

This work is partly supported by the National Key R&D Program of China under Grant No. 2017YFA0402300 and the National Natural Science Foundation of China through Grant No. 11675279.

International Standard Serial Number (ISSN)

2469-9926

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2020 American Physical Society, All rights reserved.

Publication Date

28 Oct 2020

Included in

Physics Commons

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