New Bands and New Analyses in the Spectrum of the Baldet-Johnson (B2Σ+-A2Πi) System of CO+

The Comet-Tail (A2Πi–X2Σ+) System of 12C16O+: A Reinvestigation

“…The dimensionless variance in the fit is 2.5 and the root-mean-square deviation is ϳ0.016 cm Ϫ1 . A set of 54 molecular parameters for the v ϭ 0 to 4 levels for both states A 2 ⌸ i and X 2 ⌺ ϩ thus obtained are listed in Table 2 benek et al (13), the wavenumbers of the 0 -1, 0 -2, 0 -3, and 0 -4 bands of the A-X system can be reproduced up to J ϭ 22.5 with an accuracy of 0.01 cm Ϫ1 . Beyond this J value there is a deviation in the ( obs -cal ) values from Ϫ0.028 to Ϫ0.195 cm Ϫ1 for J ϭ 24.5 to J ϭ 33.5.…”

Analysis of the Comet-Tail (A2Π –X2Σ+) Bands of 13C16O+

“…As a source of the emission spectrum of the comet-tail bands, just as in our earlier investigations of the spectra of the CO + molecule (14,19,20) an air-cooled hollow-cathode discharge tube was used. The tube was filled with carbon monoxide enriched with carbon 13 C with about 90% concentration of the 13 C isotope and at a pressure of 0.1 kPa.…”

“…The corresponding constants necessary for the above calculations have been obtained by isotopic recalculating of equilibrium molecular contants of the A (11,20) and X (11,25) states obtained earlier for the 12 C 16 O + molecule. The final analysis and the calculation of constants were performed in many stages via a nonlinear least-squares procedure and by means of effective Hamiltonians proposed by Brown et al (26).…”

New spectroscopic studies of the Comet–Tail (A2Πi–X2Σ+) system of the CO+ molecule

“…As a result of this calculation (Merging 1) 64 molecular constants characterizing the v 0 = 0-4 and 6-8 vibrational levels of the A 2 P i state and v 00 = 0-2 of the X 2 R + state were determined. Taking into account the fact, that many levels of the X state were earlier investigated in our laboratory in the B-X transition, as well as the A Table 4 Rotational structure constants (in cm À1 ) for the X 2 R + state in the 12 state levels were observed and analyzed during the work on B-A system, aiming at enlargement and completeness of the information about both states of the A-X transition, the following stage of the constants calculation was merge fit (Merging 2) involving present-day investigated bands of A-X system, earlier analyzed 0-3, 1-3, 1-4, 1-5, 2-4, and 2-5 bands of B-X system [30], the 0-0, 0-1, 0-2, 1-0, 1-2, 1-3, and 2-0 bands belonging to B-A system [31] and the 1-2 and 2-3 bands of A-X system, which were observed and analyzed lately by Zhuang et al [23]. However, as a result of the changing resolving power of the spectrograph, from band to band, and the changing c 00 -constant, deciding about the spin structure splitting of band lines of the A-X system and the changing of the difference of the c 0 -c 00 constants for the B-X band system, different ranges of band branches were recorded with a resolved spin structure of lines.…”

“…Also, the RKR potential curve parameters for A 2 P i state and the r-centroids and the Franck-Condon factors for the A-X transition calculated in the present work are more accurate. It was Zhuang et al [23] who recently obtained these values on the basis of the molecular constants provided by Bembenek et al [31] for the A 2 P i state and by Haridass et al [15] for the X 2 R + state. Bembenek et al [31] investigated the A state only up to v = 3.…”