New spectroscopic investigations of the fourth-positive (A1Π → X1Σ+) system bands in the 13C16O molecule

The present work puts forward the results of the recordings carried out under high resolution by conventional, photographic spectroscopy and modern analysis of thirteen bands with v' = 7-12 and v '' = 16-24 of the fourth-positive (A(1)Pi -> X-1 Sigma(+)) band system. The current investigations include the region of the observed (CO)-C-13-O-16 molecule spectrum, much greater now than before. Especially, new transitions connected with not hitherto observed v' = 12 vibrational level of the A(1)Pi state, were recorded and studied. Moreover, the region of perturbations observed in the upper state of the fourth-positive system was significantly enlarged. The observed perturbations were confronted with those predicted from theoretical calculations. (C) 2011 Elsevier Inc. All rights reserved.