ELECTRON-CAPTURE INTO N4-LI COLLISIONS AT 40-120 KEV((1S(2)NL) SUBSHELLS DURING N5+)

We have recorded photon spectra during collisions between N5+ ions and lithium atoms in the range 200-600 nm at different projectile energie s (40-120 keV). The spectral resolution allowed the determination of c apture cross sections of nl subshells with principal quantum numbers n = 6, 7 and 8. The experimental results are compared to calculations u sing the three-body classical trajectory Monte Carlo method (CTMC). On the whole, a good agreement between experimental and CTMC calculated results is obtained. The influence of the projectile core electrons is examined comparing CTMC calculations for the B5+-Li collision system to those for N5+-Li. A small but not negligible core-electron effect i s observed which manifests itself mainly in the population of the N4+( ns) subshells.