Vacuum ultraviolet laser spectroscopy: I. Fluorescence studies of the B′2Δ state of NO
- 1 December 1984
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Physics
- Vol. 62 (12) , 1629-1638
- https://doi.org/10.1139/p84-209
Abstract
Individual rotational levels of the B′2Δ state (ν′ = 1 – 8) of nitric oxide have been excited using tunable, coherent, vacuum ultraviolet radiation (in the range 140–170 nm) generated by four-wave mixing in magnesium vapour. Excitation spectra have also been obtained for the F2Δ, N2Δ, D2Σ+, E2Σ+, and M2Σ+ Rydbcrg states. Time-resolved fluorescence intensity measurements of rotational levels in ν′ = 1, 2, 3, 5, and 8 of the B′2Δ state indicated single-exponential decay over a large pressure range, resulting in average lifetimes of ~225 ns. Rotational levels in ν′ = 4, 6, and 7 displayed non-single-exponential decay. This behaviour is attributed to enhanced collisional population transfer from the B′2Δ state to the F2Δ and N2Δ states as a result of strong interaction amongst these states.Keywords
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