Self broadening in the nu-1 band of NH3

Details Self broadening in the nu-1 band of NH3 Self broadening in the nu-1 band of NH3

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jqsrt..50..167m&link_type=abstract

Journal of Quantitative Spectroscopy & Radiative Transfer (ISSN 0022-4073), vol. 50, no. 2, p. 167-178.

Computer Science

21

Ammonia, Laser Spectroscopy, Spectral Bands, Spectral Line Width, Absorption Spectra, Electron Transitions, Ground State, Pressure Dependence

Scientific paper

Self-broadening coefficients, pressure shifts, and integrated intensities have been measured for Q- and R-branch transitions in the nu-1 fundamental band of ammonia using a difference-frequency laser spectrometer. A strong, systematic J and K dependence of the broadening coefficients, reminiscent of the ground-state inversion transitions, is observed and compared with semiclassical line broadening calculations. Dicke narrowing is evident at intermediate pressures for the sharpest lines, primarily the R(J, 0) transitions. Incipient line mixing is apparent in the Q branch at pressures above about 0.1 bar.

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