DETERMINATION OF $\eta$ FOR THE SPECTRAL LINE R (4) OF HYDROGEN $FLUORIDE^{*}$

Abstract

$^{*}$Supported by the Air FORCE Cambridge Research Laboratories. $^{\dag}$Supported by the U. S. Naval Postgraduate School.Author Institution: The University of Tennessee“The line shape of pressure-broadened spectral lines can be represented by the modified Lorentz expression $\alpha = \alpha_{o}(\Delta \nu)^{2}[|\nu - \nu_{o}|^\eta + (\Delta \nu)^{2}]^{-1}$. An investigation of the value of $\eta$ for the R(4) spectral line of the fundamental band of HF has been made to determine the variation of as a function of distance from line center. The range $\eta$ was found to be $\eta = 2.00$ for $|\nu - \nu_{0}| 3 cm^{-1}$, and n varies linearly from 2.00 to $1.82 \pm .03$ for $2 cm^{-1} < | \nu - \nu_{o}| < 3 cm^{-1}$.