Laser-modified charge-transfer processes in proton collisions with lithium atoms

Abstract

A time-dependent semiclassical lattice solution of the Schr\odinger equation is used to calculate charge-transfer processes in proton collisions with lithium atoms. State-selective cross sections are obtained at 5--15 keV incident energy for laser excited $2p\ensuremath{\sigma}$ states aligned parallel and $2p\ensuremath{\pi}$ states aligned perpendicular to the ion beam. State-selective cross sections are also obtained at 5 keV for ${1s}^{2}2s$ ground states in which the polarization of a moderately intense pulsed laser is aligned parallel and perpendicular to the ion beam. The addition of a pulsed laser is found to have a strong effect on the charge-transfer cross sections to the $n=3$ excited states of hydrogen.