Strongly perturbed state-selective charge exchange between slow ${\mathrm{Ar}}^{8+}$ and He

Open Access

Strongly perturbed state-selective charge exchange between slow ${Ar}^{8 +}$ and He

R. T. Zhang, J. W. Gao, Y. W. Zhang, D. L. Guo, Y. Gao, X. L. Zhu, J. W. Xu, D. M. Zhao, S. Yan, S. Xu, S. F. Zhang, Y. Wu, J. G. Wang, and X. Ma

Phys. Rev. Research 5, 023123 – Published 25 May 2023

Abstract

We report an experimental and theoretical study of state-selective charge exchange processes in ${Ar}^{8 +}$ on He collisions at 1 and 3 keV/amu, benchmarking the fundamental electron capture dynamics under strong perturbations. The quantum-state selectivity has been experimentally resolved for one $1 s$ electron of He capture into $4 s$ , $4 p$ , $4 d + 4 f$ , and $5 s$ states of ${Ar}^{7 +}$ ion along with the corresponding scattering angle differential cross sections. By comparing to theoretical calculations with a two-active-electron semiclassical asymptotic-state close-coupling approach, we are able to verify the important role of electronic correlations during the collisions and that the impact parameter sensitive transition probability significantly mediates the state-selective specifics.

Received 20 January 2023
Accepted 6 April 2023

DOI:https://doi.org/10.1103/PhysRevResearch.5.023123

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.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Atomic & molecular collisions Charge-transfer collisions Scattering of atoms, molecules, clusters & ions

Atomic, Molecular & Optical

Authors & Affiliations

R. T. Zhang ^1,4,*,†, J. W. Gao ^2,*,‡, Y. W. Zhang⁵, D. L. Guo^1,4, Y. Gao^1,4, X. L. Zhu ^1,4, J. W. Xu¹, D. M. Zhao¹, S. Yan^1,4, S. Xu^1,4, S. F. Zhang^1,4, Y. Wu^3,5, J. G. Wang³, and X. Ma ^1,4,§

¹Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
²School of Physics, Hangzhou Normal University, Hangzhou 311121, People's Republic of China
³Key Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, People's Republic of China
⁴University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
⁵HEDPS, Center of Applied Physics and Technology, Peking University, 100871 Beijing, People's Republic of China