Dielectronic processes producing radiative stabilization in slow Ne10+ + He collisions
Résumé
Different contributions to radiative stabilization in Ne10+ + He collisions at projectile energies of 10 and 150 keV are studied. For both energies, radiative stabilization is found to be equal to ~0.3 when referred to the total double capture. In Ne10+ + He collisions doubly excited states 3lnl′ and 4lnl′ (n≥4) are either produced by uncorrelated two-electron transitions or by dielectronic mechanisms due to electron-electron interaction. A strong contribution (~0.15) to the stabilization follows from the decay of near-equivalent electrons 3lnl′ and 4lnl′(n=4,5). Another major contribution (0.10–0.25) to stabilization is due to the decay of configurations 3lnl′ (n≥6) of nonequivalent electrons produced by the dielectronic process of autoexcitation. A small contribution is found to be due to the configurations 3lnl′ (n≳9) created by dielectronic phenomena in the postcollisional and asymptotic regions (~0.04).