Energy-loss spectra of Ar²⁺-Ne collisions

Abstract

High resolution differential single-electron capture functions are measured for 540 eV Ar²⁺-Ne collisions in exit channels defined by energy-defect analysis. The oscillatory functions are interpreted in terms of long-range crossings of diabatic potential energy curves dominated by the Coulomb repulsion of the product ions. The probabilities of capture into the ground state of the product ions are deduced as a function of impact parameter and compared with those expected on the basis of the semi-classical method of Bates et al, using the exchange matrix element H₁₂ derived from the semi-empirical relationships of Olson et al.