Volume 74, Number 6, June 2006
|Page(s)||992 - 998|
|Section||Atomic and molecular physics|
|Published online||17 May 2006|
Identification of distinct two-electron transfer processes in collisions
KVI, Atomic Physics, Rijksuniversiteit Groningen - Zernikelaan 25 NL-9747 AA Groningen, The Netherlands
Corresponding author: email@example.com
Accepted: 24 April 2006
Two-electron capture in 7.5 collisions is investigated by measuring the momenta of the recoil ions. The Q-value spectrum shows two groups of two-electron capture channels, namely and (). The manifolds in between, and , are barely populated. The population of the () states occurs via two consecutive one-electron transitions, while transfer to the channels occurs at a direct crossing with the entrance channel. These findings show that for capturing two non-equivalent electrons the population of symmetric and asymmetric nln'l' projectile states can also be described by dielectronic and monoelectronic transitions, respectively, just as for the capture of two equivalent electrons from noble gasses. However, the population mechanisms are the other way round.
PACS: 34.70.+e – Charge transfer / 32.80.Pj – Optical cooling of atoms; trapping
© EDP Sciences, 2006
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