PRESSURE SHIFTS IN THE $\NU_{3}$-BAND OF $NO_{2}$, INDUCED BY COLLISIONS WITH NOBLE GASES, $N_{2}$, $H_{2}$, $D_{2}$, $O_{2}$, $CO_{2}$, AND $SO_{2}$
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Date
1996
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Ohio State University
Abstract
Very high resolution (0 .0005 $cm^{-1}$) infrared spectra of $NO_{2}$ have been recorded with a pulse driven diode laser spectrometer.The $1600 cm^{-1}$ region correspoding to the $\nu_{3}$-band has been analysed. 34 lines ($6 \leq N^{\prime\prime}\leq 38, 0 \leq K^{0}_{o} \leq 11$) with $NO_{2}$ pressure varying from 0.1 to 0.5 Torr and foreign gas (Xe, Kr, Ar,...) from 100 to 220 Torr were recorded using a Herriot cell of 4.7m pathlength due the weakness of lines. The results, clearly shows (within experimental accuracy) a notable variation of shift with respect to $N^{\prime\prime}$ quantum number, the shifts being larger in negativ magnitude for big $N^{\prime\prime}$. One can also note that the values of shifts are not systematically lower for molecules with higher broadening coefficients as it is for $H_{2}O$. The similarities and differences between $H_{2}O$ and $NO_{2}$ will be discussed.
Description
$^{*}$B.S. acknowledges a grant from the Deutsche Forschungsgemeinschaft $^{1}$B.Grossmann and E.Browell, J. Mol. Spectrosc. 138, 562 (1989)
Author Institution: Optisches Institut der Technischen, Uinivrsit t Berlin; Departement de Physique, Universit de Champagne-Ardenne Reims; Optisches Institut der Technischen, Universit t Berlin; Optisches Institut der Technischen, Universit t Berlin
Author Institution: Optisches Institut der Technischen, Uinivrsit t Berlin; Departement de Physique, Universit de Champagne-Ardenne Reims; Optisches Institut der Technischen, Universit t Berlin; Optisches Institut der Technischen, Universit t Berlin