The 1 – v’’ bands progression of the B2Σ+ - X2Σ+ system of 12C17O+.

The B2Σ+ → X2Σ+ (0-1, 2, 3, 4 progression) electronic transition of 12C17O+ was first observed and analyzed by Szajna and Kȩpa [Spectrochim. Acta A 65 (2006) 1014-1020]. We have now extended our previous studies. The use of high resolution conventional spectroscopic techniques has allowed first rotational analysis of the 1-2, 1-3, 1-4 and 1-5 bands of the first negative system in the 37,000-43,000 cm-1 spectral region. Approximately 500 transition wavenumbers were measured with an estimated accuracy of 0.005 cm-1. The present data were combined with the previous measurements to yield an improved set of molecular constants for the B2Σ+(v′ = 0, 1) and X2Σ+(v″ = 1, 2, 3, 4, 5). The v′ = 1 and v″ = 5 vibrational levels were observed for the first time and the main molecular constants are (in cm-1, one standard deviation in parentheses). {A table is presented}. The principal equilibrium molecular constants for the B2Σ+ and X2Σ+ states have also been derived and the vibrational terms values for the ground and excited states have been calculated. © 2006 Elsevier Inc.