The hydrogen and helium pressure broadening at planetary temperatures of the 183 and 380 GHz transitions of water vapor

Details The hydrogen and helium pressure broadening at planetary temperatures of the 183 and 380 GHz transitions of water vapor The hydrogen and helium pressure broadening at planetary temperatures of the 183 and 380 GHz transitions of water vapor

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993icar..102..232d&link_type=abstract

Icarus (ISSN 0019-1035), vol. 102, no. 2, p. 232-239.

Physics

15

Atmospheric Temperature, Gas Pressure, Helium Hydrogen Atmospheres, Planetary Atmospheres, Water Vapor, Atomic Collisions, Planetary Temperature, Temperature Effects

Scientific paper

A collisional cooling method has developed to measure the H2- and He-broadening parameters of the 183- and 380-GHz water vapor lines over a much wider range of temperatures than using conventional techniques. As an application, the H2 and He pressure-broadening coefficients of the 3(1,3)-2(2,0) and 4(1,4)-3(2,1) rotational lines of water at 183,310 and 380,197 MHz respectively. The temperature dependencies of the coefficients from 80 to 600 K are reported, and a simple power law is found to be sufficient to describe the temperature variation.

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