Abstract

A 1-m length absorption cell has been designed for observation of ir absorption spectra of gases at high temperatures. The design allows use of windows of NaCl, KBr, etc., which have a tendency to cleave when subjected to temperature variations. The absorption spectrum of HCl³⁷ at temperatures in excess of 800°C revealed more than twenty-five previously unobserved lines in the 1–0 band of this molecule. Some molecule constants of HCl³⁷ have been evaluated. Usefulness of the cell in work connected with other molecular problems has been indicated.

© 1966 Optical Society of America

Spectroradiometric Pyrometry of Shock-Heated Gases by Infrared Emission and Absorption Measurements

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Absorption cell for the infrared spectroscopy of heated gas

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Total Absorptance of Ammonia in the Infrared*

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