VIBRATION-ROTATION BANDS OF NITROUS OXIDE: 4.1 MICRON REGION
Loading...
Date
1973
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
The infrared spectrum of nitrous oxide from $2265 cm^{-1}$ to $2618 cm^{-1}$ has been measured with high resolution ($0.025 cm^{-1}$, approximately). This region encompasses the Fermi polyad $\{20^{0}0 - 04^{0}0\}$. By using long path length and low sample pressure it was possible to observe ``second hot” bands and isotopic bands of $^{15}N$ and $^{18}O$ corresponding to the main bands in this region. The rotational structure of the vibrational bands measured has been completely determined. The measurement of these spectra has led to improved values of the molecular constants of the upper states involved. The most interesting feature observed in this region is the appearance of two bands normally forbidden by ordinary vibration-rotation selection rules. These bands, $12^{2c}0 -00^{0}0$ and $04^{2c}0 - 00^{0}0$, occur because of the ($\ell|\ell + 2$) matrix elements due to Coriolis coupling with the $\ell = 0$ vibrational levels.
Description
Author Institution: Institute for Molecular Physics, University of Maryland; National Bureau of Standards, University of Maryland