Direct infrared absorption of rotationally cooled molecules
Loading...
Date
1981
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
By combining the techniques of supersonic jet spectroscopy and Fourier transform infrared spectroscopy, a new method for obtaining the infrared absorption spectra of rotationally cooled gaseous molecules has been developed. With this method the entire high resolution spectrum is obtained over a wide frequency range e.g. 400 to $4000 cm^{-1}$ using a pure unskimmed jet. Study of the intensity distribution of the cooled ammonia spectrum, has yielded information about the collisional energy transfer during the expansion of the gas. A model for the cooling process, which is consistent with these data and with the collisional selection rules, has been formulated.
Description
Author Institution: