title: Measurements of (12)CH4 nu4 band halfwidths using a tunable diode laser system and a Fourier transform spectrometer.
abstract: Air-broadened and N2-broadened halfwidths at room temperature for twenty-five transitions in the 4 fundamental band of '2CH4 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.
authors.affiliation: College of William and Mary, Physics Department, Williamsburg, Virginia 23185, USA.
authors.forename: V
authors.initials: V
authors.lastname: Malathy Devi
authors.forename: C P
authors.initials: CP
authors.lastname: Rinsland
authors.forename: M A
authors.initials: MA
authors.lastname: Smith
authors.forename: D C
authors.initials: DC
authors.lastname: Benner