Nitrogen Broadening of Absorption Lines in the nu1, nu2, and nu3 Bands of H2S Determined by Applying an IR Diode Laser Spectrometer
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
Meusel
I
Optisches Institut der Technischen Universitat Berlin, Sekretariat PN 0-1, Hardenbergstr. 36, Berlin, 10623, Germany
Sumpf
B
Kronfeldt
H