New spectroscopic studies of the Comet–Tail (A 2Π i–X 2Σ +) system of the CO + molecule

Abstract

In the electronic emission spectrum of the 12C 16O + molecule, 11 bands of the Comet–Tail ( A 2Π i – X 2Σ +) system have been recorded and analyzed. Spin splitting in most of the observed lines of the 0–2, 1–0, 2–0, 2–1, 3–0, 4–0, 4–2, 6–0, 7–0, 7–1, and 8–1 bands, comprising nearly 3400 lines, has been recorded under high resolution by conventional spectroscopy. The rotational analysis of bands has been performed by nonlinear least-squares procedures and by means of effective Hamiltonians of Brown et al. and the rovibronic structure parameters have been obtained. The data of bands of the A– X system and earlier analyzed bands of the B– X and B– A systems have been merged together. As a result of this global fit, the state of information about the energy structure has been significantly enlarged for the A state and enlarged and improved for the X state. Also RKR potential curves for both states and Franck–Condon factors as well as r-centroids of the Comet–Tail system of CO + have been calculated.