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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KTH, Superseded Departments, Physics.ORCID iD: 0000-0001-7389-5501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, p. art. no.-32718Article 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, p. art. no.-32718
Keyword [en]
electron-impact dissociation, doubly-excited resonances, o-2, o2, photodissociation, state, photoionization, fluorescence, emission, valence
Identifiers
URN: urn:nbn:se:kth:diva-19617ISI: 000085836300061OAI: oai:DiVA.org:kth-19617DiVA, id: diva2:338309
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Rachlew-Källne, Elisabeth

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