OVERTONE SPECTROSCOPY IN $N_{2}O$

Abstract

The near infrared and visible absorption spectrum of nitrous oxide ${^{14}}N_{2}{^{16}}O$ has been recorded by Fourier Transform Absorption Spectroscopy, between 6500 and $11000 cm^{-1}$, and by Intracavity Laser Absorption Spectroscopy, between 11700 and $15000 cm^{-1}$, Fifteen new bands are observed and, altogether, thirty four cold and nine hot bands are rotationally analysed. The related upper term values, vibrational assignments and principal rotational constants, as well as the relative band intensities will be quantitatively discussed in terms of the formation of vibrational clusters, on the basis of the effective Hamiltonian developed by Teffo and $coworkers^{1}$.