Issue |
Europhys. Lett.
Volume 74, Number 6, June 2006
|
|
---|---|---|
Page(s) | 992 - 998 | |
Section | Atomic and molecular physics | |
DOI | https://doi.org/10.1209/epl/i2006-10056-2 | |
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: hoekstra@kvi.nl
Received:
10
March
2006
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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