VIS and VUV spectroscopy of (CO)-C-12-O-17 and deperturbation analysis of the A(1)II, nu=1-5 levels

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

Research output: Contribution to JournalArticleAcademicpeer-review


High-accuracy dispersive optical spectroscopy measurements in the visible (VIS) region have been performed on the less-abundant (CO)-C-12-O-17 isotopologue, observing high-resolution emission bands of the B-1 Sigma(+) (nu = 0) -> A(1) II (nu = 3, 4, and 5) Angstrom system. These are combined with high-resolution photoabsorption measurements of the (CO)-C-12-O-17 B-1 Sigma(+) (nu = 0) X-1 Sigma(+) (nu = 0) and C-1 Sigma(+) (nu = 0)) X-1 Sigma(+) (nu = 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 A(1)II, nu = 1-5 levels of (CO)-C-12-O-17, taking into account interactions with levels in the d(3) Delta(i), e(3)Sigma(-), a(,3)Sigma(+), I-1 Sigma-and D-1 Delta states. The A(1) II 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
Pages (from-to)31588-31606
JournalRSC Advances
Issue number38
Publication statusPublished - 2016


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