Angular distributions of H − fragments from H +2 on Mg at low keV collisions

Abstract

Three interesting structures have been observed on the angular distributions of the H − fragments produced by the collision of H + 2 on Mg at projectile energies of 1, 2, 3, 4 and 5 keV. The good matching of the distributions to the a scaling law ( 1 E inc ) dσ dω = ƒ(E inc θ 2 ) indicates that the same mechanism is acting over this range of energies. The mechanism proposed for the production of H − is through the predissociative states of H + 2 interacting with the target.