Classical trajectory Monte Carlo calculations have been performed for ion-atom collisions in the velocity matching region for target Rydberg states of given specific n and l. A classical ensemble derived previously is used, which corresponds to the set of hydrogenic quantum states of fixed n and l. Substantial dependence on the initial l value is found for charge transfer, ionisation, and excitation cross sections. For charge transfer, the distributions over the final n' show peaks in substantial agreement with a recent experiment of Rolfes and MacAdam (1982). Experimental data for the other processes are not yet available.

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We shpw that the p-atomic data fpr p+ l2C l6O, S, and 9Y dp npt yield unique p-nucleus potentials. Two families of potentials are found, one with shallow imaginary and deep real parts and one with deep imaginary and shallow real parts. We examine some possible consequences for the n-n oscillation time, for p-nuclear bound states, and for p-nucleus scattering.

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