The Ångstrom (B¹Sigma⁺- A¹Pi) system of the CO molecules: new observations and analyses

Abstract

In the emission spectrum of the CO molecule four bands: 1-2, 1-7, 1-8, 0-6 which have not been observed so far and the 1-5 band belonging to the Ångstrom system (B 1Sigma+ - A 1Pi) have been found and photographed by conventional spectroscopy. The rotational analysis of bands made it possible to extend and to improve the information for both combining states. Especially the spectroscopic and quantum-mechanical constants of the B 1Sigma+ Rydberg state around its v=0 and 1 levels were more precise and more extended. A new quantitative classification of the relative band intensities for the currently extended Angstrom system bands has also been proposed.