THE INFRARED SPECTRUM OF LIQUID HD
Loading...
Date
1985
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
We have measured the spectrum of liquid hydrogen deuteride in the region of the fundamental band ($3500-4000 cm^{-1}$) and of the pure rotational R(0) transition ($80-90 cm^{-1}$). The experiments were performed using a Bomem DA3.002 spectrometer and a 1 cm path; the liquid was followed along the gas-liquid coexistence line from 18 to 35 $^{\circ} K$. Of special interest are the effects of interference between the permanent dipole moment of HD and the transient dipoles induced during molecular collisions. These effects have been studied in the gas $phase,^{1}$ and were also observed in solid $HD.^{2}$ We observe a pronounced anomalous dispersion (Fano) lineshape for the $R_{1}(0)$ transition around $3715 cm^{-1}$, whereas the $R^{0}(0)$ transition around $88 cm^{-1}$ is only slightly asymmetric. A weak, sharp absorption feature was observed in the liquid at 18 $^{\circ} K$ on the high frequency side of the broader Fano $R_{1}(0)$ profile; this feature resembles the beginning of the stronger sharp feature observed in the $solid.^{2}$
Description
$^{1}$N. H. Rich et al., Can. J. Phys. 61, 1648 (1983); 62, 1665, 1673 (1984). $^{2}$A. Crane and H. P. Gush, Can. J. Phys. 44, 373 (1966).
Author Institution: National Research Council of Canada, Herzberg Institute of Astrophysics; National Research Council of Canada, Herzberg Institute of Astrophysics; Department of Physics, Memorial University of Newfoundland
Author Institution: National Research Council of Canada, Herzberg Institute of Astrophysics; National Research Council of Canada, Herzberg Institute of Astrophysics; Department of Physics, Memorial University of Newfoundland