Abstract
The role of the internuclear potential in angular distributions is re-examined. Following an eikonal method of McCarroll et al. (1966, 1968) the effective internuclear potential is represented by a static potential. The shape of the differential cross section is in better agreement with the observed results of Bratton et al. (1977) than is the cross section obtained by Belkic et al. (1976) using an unscreened Coulomb potential. In contrast to other methods, the present results give good agreement for the energy dependence of the angle theta 1/2 where the distribution falls to half the forward maximum observed by Wittkower et al. (1967) and by Bratton (1977).
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