Abstract
Electron-capture cross sections for H+ plus alkali-metal atom (Na, K, Rb, and Cs) systems have been computed for projectile energies from 10 eV to 10 keV. An impact parameter perturbed-stationary-state theory using molecular states that incorporate electron translation factors was used to calculate the cross sections. The wave functions were generated by employing the pseudopotential method. These yield equilibrium parameters Re and De for the A +2 molecular state that are in good agreement with ab initio results. Interaction energies are also presented for the LiH+ system. Basis sets of up to eight molecular states were used to calculate the electron-capture cross sections from ground (ns) as well as from the first excited (np) states of the alkali-metal atoms. Results for electron capture from the ground-state alkali-metal atom are in good agreement with the recent experiments of Nagata. Electron capture from excited alkali-metal (np) atoms does not yield enhanced cross sections relative to capture from the ground state and, in fact, shows decreased cross sections for the heavy alkali-metal atoms. Such behavior is contrary to predictions made using arguments based on the magnitude of the energy gap E to the electron-capture product states. © 1982 The American Physical Society.
Recommended Citation
M. Kimura et al., "Molecular Treatment Of Electron Capture By Protons From The Ground And Excited States Of Alkali-metal Atoms," Physical Review A, vol. 26, no. 6, pp. 3113 - 3124, American Physical Society, Jan 1982.
The definitive version is available at https://doi.org/10.1103/PhysRevA.26.3113
Department(s)
Physics
International Standard Serial Number (ISSN)
1050-2947
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2023 American Physical Society, All rights reserved.
Publication Date
01 Jan 1982
