Electron capture into eight excited states ofLi7in collisions of 2-keVLi+7onH2

We have measured relative intensities of emission from the $2p$, $3s$, $3p$, $3d$, $4s$, $4d$, $5s$, and $5d$ states of ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$ produced in 444-eV (relative energy) collisions (2-keV ions on thermal molecules) of ${}_{}{}^7{}_{}{}^{}\mathrm{Li}_{}^{+}{}_{}{}^{}$ with ${\mathrm{H}}_2$. From these, relative values of the direct charge-transfer cross sections ${\sigma }_c$ were obtained. It was found that ${\sigma }_c$ decreases rapidly and smoothly (approximately as ${10}^{-(n-3\mathrm{})\mathrm{}}$), with increasing principal quantum number $n$ (for $n=3,4,5$) while the variation in ${\sigma }_c$ with angular momentum quantum number is not regular; ${\sigma }_c\left(3\mathrm{}s\right)\sim {\sigma }_c\left(3\mathrm{}p\right)$ but ${\sigma }_c\mathrm{}\left(\mathrm{nd}\right)\mathrm{}\sim 10{\sigma }_c\mathrm{}\left(\mathrm{ns}\right)\mathrm{}$, in sharp contrast to the behavior of capture cross sections at high energies.