Absolute Line Intensities in the ν3Band of12CH3F by Diode-Laser Spectroscopy

Infrared absolute line intensities of the ν3band of12CH3F have been measured around 9.5 μm using a diode-laser spectrometer. These line strengths were obtained from the equivalent width method and, for a few lines, by fitting a Rautian profile to the measured shape of the lines. From these results, we have deduced the vibrational bandstrength (Sv0= 379.2 ± 5.9 cm−2·atm−1at 296 K) and the first Herman–Wallis factor (α = 0.35 × 10−3± 0.10 × 10−3).