13 January 1999 Collision narrowing of unresolved H2O doublets
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Proceedings Volume 3583, Fifth International Symposium on Atmospheric and Ocean Optics; (1999) https://doi.org/10.1117/12.336998
Event: Fifth International Symposium on Atmospheric and Ocean Optics, 1998, Tomsk, Russian Federation
About 150 lines of the (nu) 2 band of H2O were measured by Fourier transform spectrometer of Paris VI University, with a spectral resolution of 0.005 cm -1. It was found that some of spectrally unresolved doublets reveal a significant collision line narrowing as the pressure of the buffer gas (N2) increases. Experimental data on such doublet line profiles was processed with a specially developed theory in the hard collision model under the assumption of strong collision line mixing of unresolved doublet lines. The pressure line broadening coefficients also with the line narrowing parameters were obtained. The observed difference in pressure broadening coefficients of the considered doublet (nu) 1 equals 1879.0194 and (nu) 2 equals 1879.0195 cm-1 and nearby singlet lines was explained on the basis of the developed theory.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ch. Claveau, Ch. Claveau, Alain Valentin, Alain Valentin, Victor P. Kochanov, Victor P. Kochanov, V. N. Saveliev, V. N. Saveliev, Leonid N. Sinitsa, Leonid N. Sinitsa, } "Collision narrowing of unresolved H2O doublets", Proc. SPIE 3583, Fifth International Symposium on Atmospheric and Ocean Optics, (13 January 1999); doi: 10.1117/12.336998; https://doi.org/10.1117/12.336998

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