Density dependence of the 5 micron infrared spectrum of NH3

Details Density dependence of the 5 micron infrared spectrum of NH3 Density dependence of the 5 micron infrared spectrum of NH3

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jqsrt..43..319c&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer (ISSN 0022-4073), vol. 43, April 1990, p. 319-326. Research supporte

Physics

5

Absorptivity, Ammonia, Infrared Spectra, Molecular Spectra, Dimers, Hydrogen, Lorentz Transformations, Wave Functions

Scientific paper

Measurements of dilute mixtures of NH3 in H2 were made in the window region 1900-2100/cm of the NH3 spectrum to determine is behavior with increasing pressure of H2. The spectra of pure H2, pure NH3, and mixtures of the two, in the total pressure range from 2.38 to 8.17 atm at 309 K, were obtained with a 975-cm white-cell. Synthetic spectra were calculated using precise line strengths, line positions, and a Lorentz profile. The experimental and calculated spectra are in reasonably good agreement, except that the former is super-imposed on a rather flat background not given by the calculation. A possible mechanism for this background is suggested.

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