Double-Resonance Spectroscopy on Triplet States of CO

R.T., Jongma; M.G.H., Boogaarts; Meijer, Gerard

doi:10.1006/jmsp.1994.1134

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Double-Resonance Spectroscopy on Triplet States of CO

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R.T., J., M.G.H., B., & Meijer, G. (1994). Double-Resonance Spectroscopy on Triplet States of CO. Journal of Molecular Spectroscopy, 165(2), 303-314. doi:10.1006/jmsp.1994.1134.

Cite as: https://hdl.handle.net/21.11116/0000-000C-0816-3

Abstract

Double-resonance spectroscopy is used to investigate the v′ = 2 level of the b³Σ⁺ state and perturbing high vibrational levels (v′ = 40-42) of the a′³Σ⁺ state of CO. Single rotational levels in the a³Π(v = 0) state are prepared via laser excitation on the Cameron band around 206 nm. Cavity-ring-down absorption spectroscopy is used to determine the absolute transition strength of this spin-forbidden transition; a value of A_0.0 = 41 ± 10 sec⁻¹ is obtained. A laser-induced fluorescence study is performed on the metastable triplet state molecules in the region of the 2 ← 0 band of the Third Positive System of CO. From the analysis of the interacting ³Σ⁺ states deperturbed rotational and vibrational constants as well as interaction parameters of these states are obtained. Franck-Condon factors for the transition from b³Σ⁺(v′ = 2) and (v′ = 0) to the a³Π state are obtained from dispersion measurements.