Accession Number : AD0675638

Title :   LINE MIXING BY COLLISIONS IN THE FAR INFRARED SPECTRUM OF AMMONIA,

Corporate Author : WEIZMANN INST OF SCIENCE REHOVOTH (ISRAEL) DEPT OF CHEMICAL PHYSICS

Personal Author(s) : Lightman,A. ; Ben-Reuven,A.

Report Date : JUN 1968

Pagination or Media Count : 13

Abstract : The effect of mixing by collisions on overlapping lines in the far-infrared (rotation) spectrum of gaseous ammonia was studied. A collapse of the inversion doublets into a single line, similar to the collapse of the microwave inversion spectrum into a nonresonant spectrum, has been observed. The line shape has been analyzed using an adapted form of Ben-Reuven's theory and values of the damping and cross-relaxation parameters have been obtained for the rotational lines 3 to 4, 4 to 5 and 5 to 6. (Author)

Descriptors :   (*AMMONIA, *INFRARED SPECTROSCOPY), MOLECULAR SPECTROSCOPY, ROTATION, MOLECULAR ENERGY LEVELS, ABSORPTION, RESONANT FREQUENCY, SPECTROMETERS, INTERFEROMETERS, LINE SPECTRA, ISRAEL

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE