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Radiative association and inverse predissociation of oxygen atoms

J. F. Babb, A. Dalgarno

chem-pharXiv:chem-ph/9411010

Abstract

The formation of O2 by radiative association and by inverse predissociation of ground state oxygen atoms is studied using quantum-mechanical methods. Cross sections, emission spectra, and rate coefficients are presented and compared with prior experimental and theoretical results. At temperatures below 1000~K radiative association occurs by approach along the 1\,3Πu state of O2 and above 1000~K inverse predissociation through the B\,3Σu- state is the dominant mechanism. This conclusion is supported by a quantitative comparison between the calculations and data obtained from hot oxygen plasma spectroscopy.

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