Semiclassical treatment of excitation and electron loss inAq++H(1s)collisions using spherical Bessel functions

Abstract

We perform monocentric close-coupling calculations to obtain partial and total cross sections for excitation and electron loss in bare ${A}^{q+}+\mathrm{H}(1s)$ collisions, with $1\ensuremath{\leqslant}q\ensuremath{\leqslant}6$, for intermediate $(E=40\phantom{\rule{0.3em}{0ex}}\mathrm{keV}∕\mathrm{amu})$ to high $(E=7000\phantom{\rule{0.3em}{0ex}}\mathrm{keV}∕\mathrm{amu})$ impact energies. We use underlying basis sets of even-tempered Slater-type orbitals and confined spherical Bessel functions and compare the accuracy of the cross sections derived from these two implementations. Scaling rules are then established for the partial excitation cross sections of interest in fusion plasma research. We also undertake impact parameter first-Born calculations using the spherical Bessel underlying set to compare in the course of collision the close-coupling and perturbative descriptions of the ionization process.