Fourier-transform spectroscopy of 13C17O and deperturbation analysis of the A1Π (υ=0–3) levels

R. Hakalla*, M. L. Niu, R.W. Field, A. N. Heays, E. J. Salumbides, G. Stark, J.R. Lyons, M. Eidelsberg, J.L. Lemaire, S. R. Federman, N. de Oliveira, W. Ubachs

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

The high-resolution B1Σ+→A1Π (0, 0) and (0, 3) emission bands of the less-abundant 13C17O isotopologue have been investigated by Fourier-transform spectroscopy in the visible region using a Bruker IFS 125HR spectrometer at an accuracy 0.003 cm-1. These spectra are combined with high-resolution photoabsorption measurements of the 13C17O B1Σ+←X1Σ+ (0, 0), B1Σ+←X1Σ+ (1, 0) and C1Σ+←X1Σ+ (0, 0) bands recorded with an accuracy of 0.01 cm-1 using the vacuum ultraviolet Fourier-transform spectrometer, installed on the DESIRS beamline at the SOLEIL synchrotron. In the studied 17,950–22,500 cm-1 and 86,800–92,100 cm-1 regions, 480 transitions have been measured. These new experimental data were combined with data from the C→A and B→A systems, previously analyzed in 13C17O. The frequencies of 1003 transitions derived from 12 bands were used to analyze the perturbations between the A1Π (υ=0–3) levels and rovibrational levels of the d3Δi, e3Σ-, a'3Σ+, I1Σ- and D1Δ states as well as to a preliminary investigation of weak irregularities that appear in the B1Σ+ (υ=0) level. Deperturbed molecular constants and term values of the A1Π state were obtained. The spin-orbit and L-uncoupling interaction parameters as well as isotopologue-independent spin-orbit and rotation-electronic perturbation parameters were derived.

Original languageEnglish
Pages (from-to)312-328
Number of pages17
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Volume189
DOIs
Publication statusPublished - 1 Mar 2017

Keywords

  • CO isotopologue
  • Carbon monoxide
  • FT-spectroscopy
  • High resolution VUV–VIS spectra
  • Perturbation analysis

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