Single- and double-electron capture in low-energy Ne10+-He collisions

We present a combined experimental/theoretical study of Ne 10+ -He collisions in the 50⩽ E ⩽150 keV impact energy range using improved-resolution recoil ion momentum spectroscopy. Total and differential cross sections for single-electron capture onto the levels n = 3,4,5 and 6 of Ne 9+ ( nl ) and double-electron capture onto series of doubly excited states 3, n and 4, n with n = 4, 5 and 6 of Ne 8+ have been obtained. They are found to be in good agreement with close-coupling calculations. Population mechanisms for the dominantly populated double-capture channels have been deduced from this work. Special emphasis is brought to the analysis of the partial stabilization ratios to obtain a new insight into the velocity dependence of total stabilization ratios.