Nitrogen Broadening of Absorption Lines in the nu1, nu2, and nu3 Bands of H2S Determined by Applying an IR Diode Laser Spectrometer |
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Authors: | I Meusel B Sumpf H Kronfeldt |
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Affiliation: | Optisches Institut der Technischen Universitat Berlin, Sekretariat PN 0-1, Hardenbergstr. 36, Berlin, 10623, Germany |
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Abstract: | With an infrared diode laser spectrometer in pulse mode we studied the N2 broadening of H2S absorption lines in the nu1, nu2, and nu3 bands. Altogether 22 lines were investigated: 16 lines from the R branch of the nu1 band (3 = J" = 17, 0 = Ka" = 6), 5 lines from the R branch of the nu3 band (3 = J" = 7, 1 = Ka" = 7), and one line from the R branch of the nu2 band (J" = 4, Ka" = 3). The nitrogen broadening coefficients varies strongly between 0.028 cm-1/atm = gammaH2S-N2 = 0.109 cm-1/atm. We observed a pronounced J" dependence in the studied quantum number range; i.e., with increasing J" there is a decrease of the broadening coefficient gammaH2S-N2. In contrast the Ka" dependence shows only a weak tendency. For gammaH2S-N2 of the nu1, nu2, and nu3 bands there is no significant difference between lines with comparable rotational quantum numbers. Copyright 1997 Academic Press. Copyright 1997Academic Press |
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