New high-resolution analysis of the {v1+v3} band of the 15N16O2 isotopoiner of nitrogen dioxide:: Line positions and intensities

The high-resolution Fourier transform absorption spectrum of an isotopic sample of nitrogen dioxide, N-15 O-16(2), was recorded in the 3.4 mu m region. Starting from the results of a previous study [Y. Hamada., J. Mol. Struct. 242 (1991) 367-377] a new analysis of the v(1) + v(3) band located at 2858.7077 cm(-1) has been performed. This new assignment concerns (101) energy levels involving rotational quantum numbers up to K-a = 10 and N= 54. Using a theoretical model which accounts for both the electron spin-rotation resonances within each vibrational state and the Coriolis interactions between the (120) and (10 1) vibrational states, the spin-rotation energy levels of the (10 1) vibrational state Could be reproduced within their experimental uncertainty. In this way, the precise vibrational energy, rotational, spinrotation, and coupling constants were achieved for the {(120), (101)} interacting states of N-15 O-16(2). Using these parameters and the transition moment operator which was obtained for the main isotopic species, N-14 O-16(2), a comprehensive list of the line positions and intensities was generated for the v(1) + v(3) band of N-15 O-16(2). (c) 2007 Elsevier Inc. All rights reserved.