HIGH RESOLUTION INFRARED SPECTROSCOPY IN PARA-$H_{2}$ CRYSTALS
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Date
1997
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Ohio State University
Abstract
Because of the weak intermolecular interactions, molecular rotations and vibrations are nearly free in para-$H_{2}$ crystals, and their quantum states have long relaxation $times^{h}$. Vibration-rotation transitions appear extremely sharp with line widths that are smaller than those of gaseous lines by one to two orders of magnitude ($\Delta\nu/\nu \sim 10^{-7} - 10^{-8}$). We can thus conduct high resolution spectroscopy and study solid states with unprecedented accuracy and clarity. I will discuss pure rotational (e.g. $J =6 \leftarrow 0$), pure vibrational ($v = 1 \leftarrow 0, J = 0 \leftarrow 0)$, and vibration-rotation pair transitions with emphasis on qualitative and quantitative difference between solid and gaseous spectroscopies.
Description
$^{h}$T. Oka, {Ann. Rev. Phys. Chem}. \textbf{44}, 299 (1993).
Author Institution: Department of Chemistry, The University of Chicago
Author Institution: Department of Chemistry, The University of Chicago