VIS and VUV spectroscopy of 12C17O and deperturbation analysis of the A1Π, υ = 1–5 levels. Issue 38 (29th March 2016)

• Record Type: Journal Article
• Authors: Hakalla, R.; Niu, M. L.; Field, R. W.; Salumbides, E. J.; Heays, A. N.; Stark, G.; Lyons, J. R.; Eidelsberg, M.; Lemaire, J. L.; Federman, S. R.; Zachwieja, M.; Szajna, W.; Kolek, P.; Piotrowska, I.; Ostrowska-Kopeć, M.; Kępa, R.; de Oliveira, N.; Ubachs, W.
• Is Part Of: RSC advances. Volume 6:Issue 38(2016)
• Page Start: 31588
• Page End: 31606
• Publication Date: 2016-03-29
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra01358a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The reduced T ( J ) − B A J ( J + 1) + D A J 2 ( J + 1) 2 term values for the 12 C 17 O A1 Π ( υ = 5) level and for the hypothetical unperturbed crossing rovibronic levels of the perturbers. Abstract : High-accuracy dispersive optical spectroscopy measurements in the visible (VIS) region have been performed on the less-abundant 12 C 17 O isotopologue, observing high-resolution emission bands of the B 1 Σ + ( υ = 0) → A 1 Π ( υ = 3, 4, and 5) Ångström system. These are combined with high-resolution photoabsorption measurements of the 12 C 17 O B 1 Σ + ( υ = 0) ← X 1 Σ + ( υ = 0) and C 1 Σ + ( υ = 0) ← X 1 Σ + ( υ = 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 Π, υ = 1–5 levels of 12 C 17 O, taking into account interactions with levels in the d 3 Δi, e 3 Σ −, a′ 3 Σ +, I 1 Σ − and D 1 Δ states. The A 1 Π 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.