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Dissociative recombination and excitation of D-5(+) by collisions with low-energy electrons
Stockholm University, Faculty of Science, Department of Physics.
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Number of Authors: 6
2015 (English)In: Molecular Physics, ISSN 0026-8976, E-ISSN 1362-3028, Vol. 113, no 15-16, 2099-2104 p.Article in journal (Refereed) Published
Abstract [en]

We report results from high-resolution studies of D-5(+) cluster ion collisions with low-energy electrons performed in a heavy ion storage ring. Absolute dissociative recombination (DR) and dissociative excitation (DE) cross sections were determined for the energy range from 0.0005 to 20eV. The DR cross sections were exceedingly large at low energies, and DR resulted in efficient internal energy redistribution and pronounced fragmentation with two main product channels: D-2+3D (0.62 +/- 0.03) and 2D(2)+D (0.35 +/- 0.01). The DR and DE cross sections were comparable in the energy range from 0.2 to 20eV, which suggest that the two processes follow similar dynamics and are competing outcomes of the ion-electron interaction. A simple picture of the recombination process of D-5(+) which captures the essential physics is suggested.

Place, publisher, year, edition, pages
2015. Vol. 113, no 15-16, 2099-2104 p.
Keyword [en]
dissociative recombination, dissociative excitation
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-121683DOI: 10.1080/00268976.2014.1003985ISI: 000360906000007OAI: oai:DiVA.org:su-121683DiVA: diva2:889769
Available from: 2015-12-28 Created: 2015-10-13 Last updated: 2015-12-28Bibliographically approved

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Hellberg, FredrikThomas, Richard D.Larsson, Mats
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