ELECTRON-CAPTURE FROM LI BY B-5-5+ AND BE-4+ IONS(, N)

We present state selective experimental and theoretical results for el ectron capture in B-5+ and N5+-Li collisons at energies in the range o f 1-10 keV amu-1. Experimentally we have used photon emission spectros copy in the VUV and visible spectral range and theoretically we have p erformed classical trajectory Monte Carlo (CTMC) calculations. The inf luence of projectile-core electrons on electron capture processes in s uch highly charged ion-Li collisions has been investigated by comparin g experimental data for He-like N5+ ions with both experimental and th eoretical results for the fully stripped B5+ ions. We find that in the B5+ and N5+ cases the projectile-core electrons are of no direct impo rtance for electron capture from Li by these ions. This allows us to c ompare the CTMC results for Be-4+-Li electron capture collisions with atomic orbital calculations as well as with experimental data for He-l ike C4+ colliding on Li.