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Molecular Physics
An International Journal at the Interface Between Chemistry and Physics
Volume 35, 1978 - Issue 6
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Original Articles

Laser-induced predissociation of O2+(b4Σg-←a4Πu) in an ion beam

Alan Carrington Department of Chemistry, University of Southampton, Southampton, SO9 5NH, Hampshire, U.K.
,
Philip G. Roberts Department of Chemistry, University of Southampton, Southampton, SO9 5NH, Hampshire, U.K.
&
Peter J. Sarre Department of Chemistry, University of Southampton, Southampton, SO9 5NH, Hampshire, U.K.
Pages 1523-1535 | Received 09 Dec 1977, Published online: 22 Aug 2006
 
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Abstract

We have developed a sensitive method for studying the electronic absorption spectra of molecular ions which undergo predissociation in the excited state. The method is applied to the 4-1 band of the b 4Σg←a 4Πu transition in O2 + and rotational lines of varying width are obtained. The excited predissociating state is unambiguously assigned and refined values for both ground and excited state molecular constants are derived. Analysis of the linewidths suggests that predissociation of the b 4Σg - state probably occurs through coupling with a 4Σg + state.

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