INTENSITY AND LINE SHAPE MEASUREMENTS IN THE $\nu_{4}$ FUNDAMENTAL OF METHANE
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Date
1977
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Ohio State University
Abstract
The absolute intensities of all the J-multiplets between R(13) at 1375 $cm^{-1}$ and P(12) at 1225 $cm^{-1}$ in the $\nu_{4}$-fundamental of $^{12}CH_{4}$ have been measured at $300^\circ K$ . Our values are consistent with all the published band intensity measurements and the theoretical line strength computations of Fox. Spectral transmission computation using Lorentz line shape with a hydrogen-broadened half-width of $0.075 cm^{-1}$ $atm^{-1}$ at $300^\circ K$ for all the lines in the band is in excellent agreement with our data measured with a spectral resolution of $0.2 cm^{-1}$. Our best estimate for the absolute intensity of the band is $145 \pm 8$ $cm^{-2}atm^{-1} $at S.T.P.
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Author Institution: Laboratory for Planetary Atmospheres Research, State University of New York