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Neutral fragmentation of superexcited oxygen molecules
KTH, Superseded Departments, Physics.ORCID iD: 0000-0001-7389-5501
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2000 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 61, no 3, art. no.-32718 p.Article in journal (Refereed) Published
Abstract [en]

The mechanisms of neutral dissociation of oxygen molecules in the excitation energy range 15-25 eV have been studied in a dispersed fluorescence experiment. By detecting the fluorescence from excited oxygen atoms, we find that neutral superexcited O-2 states below 20 eV dissociate into O(g.s.) + O(3s,3p). At higher excitation energies (h nu = 20-25 eV) the curve-crossing interactions following excitations to members of the Rydberg c (4)Sigma(u)(-) series also yield atoms in Rydberg states (nl,n greater than or equal to 4). The experimental data are analyzed on the ground of many-body perturbation theory, calculations which indicate the structure of the predissociating states converging to the experimentally observed ones.

Place, publisher, year, edition, pages
2000. Vol. 61, no 3, art. no.-32718 p.
Keyword [en]
electron-impact dissociation, doubly-excited resonances, o-2, o2, photodissociation, state, photoionization, fluorescence, emission, valence
URN: urn:nbn:se:kth:diva-19617ISI: 000085836300061OAI: diva2:338309
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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