Dynamics ofO6+ + H electron capture in Debye plasmas and properties of resultingO5+(nl) emission spectra

Abstract

The electron capture in ${\mathrm{O}}^{6+}$-H collisions is studied by the two-center atomic orbital close-coupling (TC-AOCC) method when the interactions of charged particles are screened and have a Yukawa form. Atomic orbitals and eigenenergies of $n$ $\ensuremath{\leqslant}$ $6$ states on ${\mathrm{O}}^{5+}$ and $n$ $\ensuremath{\leqslant}$ $2$ states on H are calculated as a function of the interaction screening parameter and used in the AOCC dynamics scheme to calculate the electron capture cross sections in the energy range $1$--$200$ keV/u. It is shown that the degree of interaction screening reduces the electron binding energies, the number of open electron capture channels, and the strength of exchange couplings, thus affecting the entire collision dynamics and the magnitude and energy behavior of electron capture cross sections. The state-selective electron capture cross sections in this collision system, as well as the intensities of a number of charge exchange spectral lines, for a number of representative interaction screening strengths are presented and discussed.