Collision-induced absorption by H2-H2 and H2-He pairs in the fundamental band - An experimental study

Details Collision-induced absorption by H2-H2 and H2-He pairs in the fundamental band - An experimental study Collision-induced absorption by H2-H2 and H2-He pairs in the fundamental band - An experimental study

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jqsrt..44..393b&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer (ISSN 0022-4073), vol. 44, Oct. 1990, p. 393-403.

Other

8

Absorption Spectra, Absorptivity, Gas Mixtures, Helium, Hydrogen, Molecular Collisions, Gas Pressure, Least Squares Method, Spectral Line Width, Wave Functions

Scientific paper

Absorption coefficients for the collision-induced fundamental band of H2, in the pure gas and interaction with He, have been measured at 298 K between 3950 and 5300/cm. The spectra were recorded with a 3-m long absorption cell for gas pressures up to 51 bar for pure H2 and to 163 bar for H2-He mixtures. In both cases, new experimental results have been obtained for the intercollisional interference Q(1) and S(1) dips, concerning essentially their width and their relative intensity. For pure H2, the measurements of binary coefficients are in excellent agreement, except in the summit of the Q-branch and in the high frequency wing, with results from a recent ab initio quantum calculation. For H2-He, the theoretical results at 300 K arising from another recent quantum calculation are natably larger than the experimental values over all of the spectral region under study.

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