Volume 93, Number 1, January 2011
|Number of page(s)||6|
|Section||Atomic, Molecular and Optical Physics|
|Published online||01 February 2011|
Electron capture processes in slow collisions of Ne6+ ions with CO2 and H2O
Department of Physics, Western Michigan University - Kalamazoo, MI 49008-5252, USA
Accepted: 3 January 2011
Energy-gain spectra and absolute total cross-sections for single-, double-, and triple-electron capture processes in collisions of Ne6+ ions with CO2 and H2O at laboratory impact energies between 450 and 2400 eV, have been studied experimentally by means of a translational energy-gain spectroscopy technique. The energy-gain spectra for single-electron capture show that the dominant reaction channels are due to capture into the n = 4 state of Ne5+, in agreement with classical over-the-barrier model calculations. In both cases, contributions due to transfer excitation into the 2s2p (1,3P) 3 l states are also detected. The energy-gain spectra are interpreted qualitatively in terms of the reaction windows, which are calculated using the single-crossing Landau-Zener (LZ) model and the extended version of the classical over-the-barrier (ECOB) model. The energy dependence of cross-sections for electron capture are also measured and found to be slowly increased with increasing collision energy. The data for single-electron capture are also compared with theoretical results based on the multi-channel Landau-Zener (MCLZ) model.
PACS: 34.70.+e – Charge transfer / 82.30.Fi – Ion-molecule, ion-ion, and charge-transfer reactions / 34.50.Fa – Electronic excitation and ionization of atoms (including beam-foil excitation and ionization)
© EPLA, 2011
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.