Mutual neutralization in H⁺ − H⁻ collisions by electron capture

¹ Department of Physics, Faculty of Sciences and Mathematics, University of Niš - P.O. Box 224, 18000 Niš, Serbia
² Karolinska Institute - P.O. Box 260, S-171 76 Stockholm, Sweden, EU

Received: 16 May 2013
Accepted: 15 July 2013

Abstract

State-selective and total cross-sections for single-electron capture from H⁻ by H⁺ covering the incident energy range from 10 to 3000 keV are computed by means of the four-body boundary corrected first Born (CB1-4B) approximation. A crucial connection between the Coulomb-distorted asymptotic state in the entrance channel and the pertinent perturbation, which causes the transition in the H⁺ − H⁻ collisions, is consistently used in our computations of the “prior” version of cross-sections. The obtained results from the CB1-4B method clearly outperform the earlier findings by the close-coupling methods for the same problem. Comparisons with the available measurements are carried out and excellent agreement with the CB1 method is recorded down to impact energies as low as 10 keV.