Abstract
A single-center coupled-channel code, based on an expansion in terms of atomic wavefunctions, which includes dynamically-curved projectile trajectories, is applied to the calculation of stopping powers. Stopping powers and mean energy transfers are evaluated for protons, anti-protons, He2+ and Li3+ ions penetrating atomic H and He targets, at energies of 10 keV/u to 500 keV/u. The results are compared to experimental data, to predictions of the first-order plane-wave Born approximation, and to results of a calculation for excitation of a harmonic oscillator including Barkas corrections. The performance of the present model as compared to first-order or second-order perturbative treatments, as well as the effect of polarization on the projectile trajectories, is discussed.
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