Radiation-induced perturbations in C2 and CH sidelight in the CO-He-Xe laser

C. E. Little*, P. G. Browne

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)


    Visible C2 and CH sidelight emission in a CO-He-Xe laser discharge exhibits intensity fluctuations of typically 30-40% when laser oscillation is chopped on and off. Chemical reactions in the discharge plasma are shown to play the major role in the perturbations of the C2 Swan and high-pressure bands and the CH 4300 AA bands. The dissociation of CO is shown to take place in the reaction of CO (a 3 Pi r) metastables and ground-state CO, and via the reaction of two vibrationally excited ground-state CO molecules, rather than via direct electron impact.

    Original languageEnglish
    Article number021
    Pages (from-to)1269-1283
    Number of pages15
    JournalJournal of Physics B: Atomic, Molecular and Optical Physics
    Issue number8
    Publication statusPublished - 1989


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