Stabilized double-electron capture in Ne{sup 10+}-He collisions: Velocity dependence of Rydberg-electron {ital n},{ital l} distributions
- Laboratoire de Spectrometrie Ionique et Moleculaire, Universite de Lyon 1, 43 boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex (France)
The distribution over the {ital n} states populated by double-electron capture in Ne{sup 10+}-He collisions has been determined in the energy range of 0.9--9 keV/u by analyzing the radiative decays of projectile Rydberg transitions. It has been found to be in fair agreement with predictions of the autotransfer-to-Rydberg-states model of Roncin {ital et} {ital al}. [J. Phys. B 26, 4181 (1993)]. Double-capture stabilization ratio {ital R}{sub {ital S}}, defined as the ratio of true double capture {sigma}{sub TDC} to the sum of {sigma}{sub TDC} and autoionizing double capture {sigma}{sub ADC}, has been studied at various energies. A slight enhancement of {ital R}{sub {ital S}} (35--50 %) and an increase by a factor of 5 of the cross sections for emission of optical transitions from (3,{ital n}) Rydberg states have been found as the projectile velocity decreases from 0.6 to 0.19 a.u. We propose a tentative explanation following a model of postcollisional satellization of Rydberg electrons.
- OSTI ID:
- 83965
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 2 Vol. 52; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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