Abstract
Recent calculations and measurements have revealed unexpected oscillations of the total cross section for excitation in low- to intermediate-energy He2+ + H collisions. A physical explanation of this behavior is given here stemming from analysis of classical trajectory Monte Carlo simulations, molecular orbital close coupling calculations, and solution of the time-dependent Schrödinger equation on a numerical lattice. These results indicate that the observed behavior should be characteristic of a wide range of reactions in ion-atom collisions.
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