VIS and VUV spectroscopy of 12C17O and deperturbation analysis of the A1Π, ν = 1-5 levels

R. Hakalla, M. L. Niu, R. W. Field, E. J. Salumbides, A. N. Heays, G. Stark, James Lyons, M. Eidelsberg, J. L. Lemaire, S. R. Federman, M. Zachwieja, W. Szajna, P. Kolek, I. Piotrowska, M. Ostrowska-Kopeć, R. Kepa, N. De Oliveira, W. Ubachs

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7 Scopus citations

Abstract

High-accuracy dispersive optical spectroscopy measurements in the visible (VIS) region have been performed on the less-abundant 12C17O isotopologue, observing high-resolution emission bands of the B1Σ+ (ν = 0) → A1Π (ν = 3, 4, and 5) Ångström system. These are combined with high-resolution photoabsorption measurements of the 12C17O B1Σ+ (ν = 0) ← X1Σ+ (ν = 0) and C1Σ+ (ν = 0) ← X1Σ+ (ν = 0) Hopfield-Birge bands recorded with the vacuum-ultraviolet (VUV) Fourier transform spectrometer, installed on the DESIRS beamline at the SOLEIL synchrotron. The frequencies of 429 observed transitions have been determined in the 15 100-18 400 cm-1 and 86 900-92 100 cm-1 regions with an absolute accuracy of up to 0.003 cm-1 and 0.005 cm-1 for the B-A, and B-X, C-X systems, respectively. These new experimental data were combined with data from the previously analysed C → A and B → A systems. The comprehensive data set, 982 spectral lines belonging to 12 bands, was included in a deperturbation analysis of the A1Π, ν = 1-5 levels of 12C17O, taking into account interactions with levels in the d3Δi, e3Σ-, a′3Σ+, I1Σ- and D1Δ states. The A1Π and perturber states were described in terms of a set of deperturbed molecular constants, spin-orbit and L-uncoupling interaction parameters, equilibrium constants, 309 term values, as well as isotopologue-independent spin-orbit and rotation-electronic perturbation parameters.

Original languageEnglish (US)
Pages (from-to)31588-31606
Number of pages19
JournalRSC Advances
Volume6
Issue number38
DOIs
StatePublished - Jan 1 2016

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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