Analysis of the two-photon D1Δ-X1Σ+ transition in CO. 2. Perturbations in the (8-0) band

Carter Kittrell, André C. Le Floch, Bruce A. Garetz

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Spin-orbit and rotation-electronic perturbations among the D1Δ(υ=8), A1Π(υ=6), d3Δ(υ=12), and a′3Σ+-(υ=17) levels have been observed in the two-photon laser excitation spectrum of the D1Δ-X1Σ+ (8-0) band of CO. To aid in the assignment of spectral lines, both prompt and delayed spectra were recorded, by gating the vacuum ultraviolet fluorescence. Spectra have been analyzed using a weighted nonlinear least-squares fitting method. Detailed assignments and wavenumbers are presented for the D-X (8-0), A-X (6-0), d-X (12-0), and a′-X (17-0) bands, as well as mixing coefficients for the D, A, and d states. Molecular constants and perturbation parameters have also been determined. Fluorescence lifetimes were obtained for some perturbed levels, and the effect of mixing on radiative and collisional decay is discussed.

Original languageEnglish (US)
Pages (from-to)2221-2227
Number of pages7
JournalJournal of physical chemistry
Issue number10
StatePublished - 1993

ASJC Scopus subject areas

  • General Engineering
  • Physical and Theoretical Chemistry


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