VISIBLE-LIGHT EMISSION IN COLLISIONS BETWEEN O5+ IONS AND HE ATOMS

Visible light emission spectra during collisions between O5+ ions and He atoms in the range of 200-800 nm at different projectile energies ( 4.06-5.31 keV . u(-1)) have been measured. Emission spectra show that there are three channels of excitation in the O5+-He collision system: (i) single-electron capture into excited stares; (ii) double-electron capture into excited stares; (iii) direct excitation of target atoms. There are transitions between states with comparably high quantum num bers nl. The absolute emission cross-sections of every spectral line a re calculated. The relations of these cross-sections with the energy o f the projectiles are studied.