State-Selective Differential Cross Sections for Single-Electron Capture in Slow He+–He Collisions

A combined experimental and theoretical study is carried out on the single-electron capture process in He+–He collisions at energies ranging from 0.5 keV/u to 5 keV/u. Using cold target recoil ion momentum spectroscopy, we obtain state-selective cross sections and angular differential cross sections. Within the entire studied energy range, the dominant channel is the electron captured into the ground-state, and the relative contribution of the dominant channel shows a decreasing trend with increasing energy. The angular differential cross sections of ground-state capture exhibit obvious oscillatory structures. To understand the oscillatory structures of the differential cross sections, we also performed theoretical calculations using the two-center atomic orbital close-coupling method, which well reproduced the oscillatory structures. The results indicate that these structures are strongly correlated to the oscillatory structures of the impact parameter dependence of electron probability.

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Publication Details

Journal
Atoms
Published
2025-08-28
DOI
https://doi.org/10.3390/atoms13090074
Primary Topic
Atomic and Molecular Physics
Type
article
Field-Weighted Citation Impact
0.00

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article

State-Selective Differential Cross Sections for Single-Electron Capture in Slow He+–He Collisions

Xiaolong Zhu, Dongmei Zhao, X. Ma, L. Liu et al.
Atoms
Atomic and Molecular Physics
article

State-Selective Differential Cross Sections for Single-Electron Capture in Slow He+–He Collisions

Xiaolong Zhu, Dongmei Zhao, X. Ma, L. Liu, Dalong Guo, Shaofeng Zhang, Shucheng Cui, Kaizhao Lin, Yong Gao, Yong Wu, Chenzhong Dong, D. Xing
article en

Abstract

A combined experimental and theoretical study is carried out on the single-electron capture process in He+–He collisions at energies ranging from 0.5 keV/u to 5 keV/u. Using cold target recoil ion momentum spectroscopy, we obtain state-selective cross sections and angular differential cross sections. Within the entire studied energy range, the dominant channel is the electron captured into the ground-state, and the relative contribution of the dominant channel shows a decreasing trend with increasing energy. The angular differential cross sections of ground-state capture exhibit obvious oscillatory structures. To understand the oscillatory structures of the differential cross sections, we also performed theoretical calculations using the two-center atomic orbital close-coupling method, which well reproduced the oscillatory structures. The results indicate that these structures are strongly correlated to the oscillatory structures of the impact parameter dependence of electron probability.

AtomsVol. 13(9)
Chinese Academy of Sciences (CN), Institute of Modern Physics (CN), Institute of Applied Physics and Computational Mathematics (CN), University of Chinese Academy of Sciences (CN), Northwest Normal University (CN)
Natural Science Foundation of Gansu Province, National Key Research and Development Program of China
Openalex Percentile: Top 83%
Atomic and Molecular Physics
DOIOpen Access PDFOpenAlex
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