Air-broadened and N2-broadened halfwidths at room temperature for twenty-five transitions in the ν4 fundamental band of 12CH4 have been determined from IR absorption spectra recorded with a tunable diode laser spectrometer. Two tunable diode lasers operating in the 1250–1380-cm-1 region were used to obtain these data. Air-broadened halfwidths for twenty of these lines were also determined from additional spectra recorded at 0.01-cm-1 resolution with the Fourier transform spectrometer in the McMath solar telescope complex on Kitt Peak. The air-broadened halfwidths obtained from these two techniques are very consistent with agreement better than 3% in most cases.
© 1985 Optical Society of America
V. Malathy Devi, Curtis P. Rinsland, Mary Ann H. Smith, and D. Chris Benner, "Measurements of 12CH4 ν4 band halfwidths using a tunable diode laser system and a Fourier transform spectrometer," Appl. Opt. 24, 2788-2791 (1985)