Excitation and charge transfer in proton-lithium collisions at 5-15 keV
M. Pindzola
Nov 1, 1999
Citations
8
Citations
Journal
Physical Review A
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Key Takeaway Key Takeaway: Proton-lithium collisions at 5-15 keV yield excitation and charge-transfer cross sections in good agreement with experimental measurements.
Abstract
Excitation and charge-transfer cross sections for collisions of protons with lithium are calculated by direct solution of the time-dependent Schr\"odinger equation on a three-dimensional Cartesian lattice. For 5\char21{}15-keV incident energies the ${1s}^{2}$ core of lithium may be treated effectively using a pseudopotential. For a proton incident on lithium, projections of the time-evolved wave function onto the lattice states of lithium yield excitation cross sections for the $\mathrm{Li}(2s)\ensuremath{\rightarrow}\mathrm{Li}(2p,3l)$ transitions. For lithium incident on a proton, projections of the time-evolved wave function onto the lattice states of hydrogen yield charge-transfer cross sections for the $\mathrm{Li}(2s)\ensuremath{\rightarrow}\mathrm{H}(2l,3l)$ transitions. The $\mathrm{Li}(2s)\ensuremath{\rightarrow}\mathrm{Li}(2p)$ excitation and $\mathrm{Li}(2s)\ensuremath{\rightarrow}\mathrm{H}(2s,2p)$ charge-transfer cross sections are found to be in good agreement with the crossed-beams experimental measurements of Aumayr et al. [J. Phys. B 17, 4185 (1984); 17, 4201 (1984); 18, 2493 (1985)].