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

Carter Kittrell, André C. Le Floch, Bruce Garetz

Research output: Contribution to journalArticle

Abstract

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
Volume97
Issue number10
StatePublished - 1993

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Carbon Monoxide
Photons
Fluorescence
perturbation
Laser excitation
photons
fluorescence
Orbits
Vacuum
line spectra
orbits
life (durability)
vacuum
decay
coefficients
electronics
excitation
lasers

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Analysis of the two-photon D1Δ-X1Σ+ transition in CO. 2. Perturbations in the (8-0) band. / Kittrell, Carter; Le Floch, André C.; Garetz, Bruce.

In: Journal of Physical Chemistry, Vol. 97, No. 10, 1993, p. 2221-2227.

Research output: Contribution to journalArticle

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N2 - 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.

AB - 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.

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