DIODE-LASER SPECTROSCOPY IN THE 9.8-MU-M NU(14)-BAND OF BENZENE - 2 -SELF-GAS, AIR-GAS, AND NOBLE-GAS BROADENING COEFFICIENTS

High-resolution diode laser spectroscopy was applied to measure broade ning coefficients in the 9.8-mu m upsilon(14) band of benzene, C6H6. S elf-broadening was investigated at 295 and 344 K for 73 lines between 1017.31 and 1045.85 cm(-1) with 9 less than or equal to J '' less than or equal to 66 and 1 less than or equal to K '' less than or equal to 66. The measured self-broadening coefficients at room temperature var y from 0.12 to 0.22 cm(-1)/atm (HWHM), whereas at 344 K the self-broad ening coefficients are in an interval between 0.07 cm(-1)/ arm to 0.16 cm(-1)/atm. The Anderson-Tsao-Curnutte (ATC) theory was used to deduc e the benzene quadrupole moment and the bo parameter from mean values of the broadening coefficients at room temperature. It could be shown that the ATC theory is able to describe the quantum number dependence and the absolute values of the self-broadening coefficients with suffi cient accuracy. The collision partner dependence of the broadening coe fficients was measured for three O-branch lines in benzene mixtures wi th air, N-2, He, Ne, Ar, Kr, and Xe. The results are compared with sim ilar experiments with NO2 and SO2 absorption lines with the outcome th at the qualitative change of the broadening coefficients with changing collision partner is similar for all three molecular gases. Air broad ening was measured for additional five lines at both temperatures ment ioned above. The experimental setup and the data treatment are describ ed in Part I of this article (J. Mel. Spectrosc., 184, 433). (C) 1998 Academic Press.