Fourier-transform spectroscopy of 13C17O and deperturbation analysis of the A1 ( = 0 - 3) levels
Abstract
The high-resolution B1+ - A1 (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 B1+ ← X1+ (0, 0), B1+ ← X1+ (1, 0) and C1+ ← X1+ (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 A1 ( = 0 - 3) levels and rovibrational levels of the d3i, e3-, a'3+, I1- and D1 states as well as to a preliminary investigation of weak irregularities that appear in the B1+ ( = 0) level. Deperturbed molecular constants and term values of the A1 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.
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