Electron capture and excitation in slow H++He*(n=3) collisions
(2001) Journal of Physics B: Atomic, Molecular and Optical Physics — Vol. 34, n° 13, p. 2631-2646 (2001)
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- Abstract
- The electron-capture and excitation processes in slow collisions of protons with He*(1s3l) are studied using the close-coupling method within the semiclassical approximation. The Stark splitting of electron-capture states on H is explicitly taken into account and the coupling-matrix elements between these states and the initial angular-momentum states on He are calculated analytically. The cross sections for excitation (de-excitation) and single-electron capture to specific spherical hydrogen states have been calculated in the relative velocity range 2 x 10(6)-1.3 x 10(8) cm s(-1). The cross section values for both types of processes in the considered velocity range are found to be large (10(-14)-10(-13) cm(2)) due to the large values of electron-exchange couplings at large internuclear distances. The excitation (de-excitation) processes are controlled by two-step exchange (capture and re-capture) transitions rather than by direct coupling among the states centred on He.
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Chibisov, M., Janev, RK., Urbain, X., & Brouillard, F. (2001). Electron capture and excitation in slow H++He*(n=3) collisions. Journal of Physics B: Atomic, Molecular and Optical Physics, 34(13), 2631-2646. https://doi.org/10.1088/0953-4075/34/13/307 (Original work published 2001)