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Model approach for low-energy inelastic atomic collisions and application to Al+ H and Al+ + H-
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
2013 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 88, no 5, 052704- p.Article in journal (Refereed) Published
Abstract [en]

A model approach is derived for estimates of cross sections and rate coefficients in low-energy inelastic collisions of hydrogen atoms and negative ions with other atoms and positive ions, which are of astrophysical interests. The approach is based on the asymptotic method for electronic molecular structure determination and on the branching probability current method for a nonadiabatic nuclear dynamical treatment. The derived approach is applied to low-energy Al + H and Al+ + H- inelastic collisions. It is shown that the processes with the largest values of cross sections and rates are the excitation and de-excitation ones between the Al(3d) and Al(4p) states in collisions with H, as well as the ion-pair formation and the mutual neutralization processes between these states and the ionic state; the second largest cross sections correspond to the similar processes involving the Al(4s) state. The mechanisms of the processes are discussed in detail.

Place, publisher, year, edition, pages
2013. Vol. 88, no 5, 052704- p.
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-212312DOI: 10.1103/PhysRevA.88.052704ISI: 000326817100003OAI: oai:DiVA.org:uu-212312DiVA: diva2:677686
Available from: 2013-12-10 Created: 2013-12-09 Last updated: 2013-12-10Bibliographically approved

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Belyaev, Andrey K.
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