Spectroscopy and perturbation analysis of the CO A1Π −X1Σ+ (2, 0), (3, 0) and (4, 0) bands. (3rd March 2016)

• Record Type: Journal Article
• Authors: Niu, M. L.; Salumbides, E. J.; Heays, A. N.; de Oliveira, N.; Field, R. W.; Ubachs, W.
• Is Part Of: Molecular physics. Volume 114:Number 5(2016)
• Page Start: 627
• Page End: 636
• Publication Date: 2016-03-03
• Subjects: Ultraviolet spectra -- FT-spectroscopy -- doppler-free laser spectroscopy -- perturbation analysis -- carbon monoxide; Molecules -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Molécules -- Périodiques; Chimie physique et théorique -- Périodiques; 539.6.05
• DOI: 10.1080/00268976.2015.1108472
• Languages: English
• ISSNs: 0026-8976

Abstract

ABSTRACT: The (2, 0) (3, 0) and (4, 0) bands of the A 1 Π −X 1 Σ + system of 12 C 16 O have been re-investigated by high-resolution vacuum ultraviolet absorption spectroscopy. A vacuum ultraviolet Fourier-transform spectrometer, illuminated by synchrotron radiation, was applied to record a jet-cooled spectrum, a room temperature static gas spectrum and a high-temperature (900 K) quasi-static gas spectrum, resulting in absolute accuracies of 0.01−0.02 cm −1 for the rotational line frequencies. Precise laser-based data were included in the analysis allowing for a highly accurate determination of band origins. Rotational levels up to J = 52 were observed. The data were used to perform an improved analysis of the perturbations in the A 1 Π, v = 2, v = 3 and v = 4 levels by vibrational levels of the D 1 Δ, I 1 Σ −, e 3 Σ −, d 3 Δ and a′ 3 Σ + states. Abstract :