Distorted-wave calculation of stopping powers for light ions traversing H targets

The continuum-distorted-wave–eikonal-initial-state model is applied to the calculation of charged charge-state electronic stopping powers. The contributions from electron capture, excitation, and ionization are evaluated for p¯, ${\mathrm{H}}^{+}$, ${\mathrm{He}}^{2+}$, and ${\mathrm{Li}}^{3+}$ projectiles impinging on H targets at energies of 10–1000 keV/amu. With the neutral H charge-state electronic stopping power obtained from the first Born approximation, charge-state fractions and total mean electronic stopping powers for ${\mathrm{H}}^{+}$ beams traversing H are calculated. Present results are compared with calculations using the first Born approximation, a one-center atomic-orbital coupled-channel code, and experimental data for ${\mathrm{H}}_2$ targets.