Analysis of the two-photon D 1Δ- X1Σ+ transition in CO: Perturbations in the (10-0) band

Bruce Garetz, Carter Kittrell, André C. Le Floch

Research output: Contribution to journalArticle

Abstract

Spin-orbit perturbations among the D 1Δ(v = 10), d 3Δ(v= 14), a3Π(v = 18), and a′ 3Σ+ (v = 19) levels of carbon monoxide have been observed in the two-photon laser excitation spectrum of the D 1Δ-X 1Σ+ (10-0) band. Spectra have been analyzed using a weighted nonlinear least-squares-fitting method. Detailed assignments and wave numbers are presented for the D-X ( 10-0), a-X (18-0), and d-X (14-0) bands. Molecular constants and perturbation parameters have been determined, and mixing coefficients have been calculated. Electronic perturbation parameters associated with the D 1Δ ∼ a 3Π spin-orbit interaction and the d 3Δ ∼ D 1Δ isoconfigurational interaction are obtained for the first time. The latter parameter could be determined because of an unusual multiple crossing among the a, d, and D states. The v = 18 level is the highest vibrational level of the a 3Π state ever observed.

Original languageEnglish (US)
Pages (from-to)843-853
Number of pages11
JournalThe Journal of chemical physics
Volume94
Issue number2
StatePublished - 1991

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Carbon Monoxide
Orbits
Photons
perturbation
Laser excitation
photons
orbit perturbation
spin-orbit interactions
carbon monoxide
coefficients
electronics
excitation
lasers
interactions

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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Analysis of the two-photon D 1Δ- X1Σ+ transition in CO : Perturbations in the (10-0) band. / Garetz, Bruce; Kittrell, Carter; Le Floch, André C.

In: The Journal of chemical physics, Vol. 94, No. 2, 1991, p. 843-853.

Research output: Contribution to journalArticle

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abstract = "Spin-orbit perturbations among the D 1Δ(v = 10), d 3Δ(v= 14), a3Π(v = 18), and a′ 3Σ+ (v = 19) levels of carbon monoxide have been observed in the two-photon laser excitation spectrum of the D 1Δ-X 1Σ+ (10-0) band. Spectra have been analyzed using a weighted nonlinear least-squares-fitting method. Detailed assignments and wave numbers are presented for the D-X ( 10-0), a-X (18-0), and d-X (14-0) bands. Molecular constants and perturbation parameters have been determined, and mixing coefficients have been calculated. Electronic perturbation parameters associated with the D 1Δ ∼ a 3Π spin-orbit interaction and the d 3Δ ∼ D 1Δ isoconfigurational interaction are obtained for the first time. The latter parameter could be determined because of an unusual multiple crossing among the a, d, and D states. The v = 18 level is the highest vibrational level of the a 3Π state ever observed.",
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N2 - Spin-orbit perturbations among the D 1Δ(v = 10), d 3Δ(v= 14), a3Π(v = 18), and a′ 3Σ+ (v = 19) levels of carbon monoxide have been observed in the two-photon laser excitation spectrum of the D 1Δ-X 1Σ+ (10-0) band. Spectra have been analyzed using a weighted nonlinear least-squares-fitting method. Detailed assignments and wave numbers are presented for the D-X ( 10-0), a-X (18-0), and d-X (14-0) bands. Molecular constants and perturbation parameters have been determined, and mixing coefficients have been calculated. Electronic perturbation parameters associated with the D 1Δ ∼ a 3Π spin-orbit interaction and the d 3Δ ∼ D 1Δ isoconfigurational interaction are obtained for the first time. The latter parameter could be determined because of an unusual multiple crossing among the a, d, and D states. The v = 18 level is the highest vibrational level of the a 3Π state ever observed.

AB - Spin-orbit perturbations among the D 1Δ(v = 10), d 3Δ(v= 14), a3Π(v = 18), and a′ 3Σ+ (v = 19) levels of carbon monoxide have been observed in the two-photon laser excitation spectrum of the D 1Δ-X 1Σ+ (10-0) band. Spectra have been analyzed using a weighted nonlinear least-squares-fitting method. Detailed assignments and wave numbers are presented for the D-X ( 10-0), a-X (18-0), and d-X (14-0) bands. Molecular constants and perturbation parameters have been determined, and mixing coefficients have been calculated. Electronic perturbation parameters associated with the D 1Δ ∼ a 3Π spin-orbit interaction and the d 3Δ ∼ D 1Δ isoconfigurational interaction are obtained for the first time. The latter parameter could be determined because of an unusual multiple crossing among the a, d, and D states. The v = 18 level is the highest vibrational level of the a 3Π state ever observed.

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