TEMPERATURE DEPENDENCE OF THE $H_{2}$-BROADENING COEFFICIENT FOR THE $\nu_{9}$ FUNDAMENTAL OF ETHANE

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 Title: TEMPERATURE DEPENDENCE OF THE $H_{2}$-BROADENING COEFFICIENT FOR THE $\nu_{9}$ FUNDAMENTAL OF ETHANE Creators: Hillman, J. J.; Halsey, G. W.; Jennings, D. E. Issue Date: 1986 Publisher: Ohio State University Abstract: Recently the vertical distribution of Jovian ethane was determined from ultra-high resolution, infrared heterodyne measurements of individual stratospheric lines near 12 $microns^{1}$. Due to uncertainties in the temperature dependence of some of the molecular parameters, we undertook an investigation of the spectrum of ethane under $H_{2}$-broadened conditions. These spectra were recorded at Doppler-limited resolving power with the GSFC tuneable diode laser spectrometer. Using our new low-temperature absorption cell we have studied the temperature dependence of this line broadening over the range 95-220K. We will discuss this experiment, the basic results, and the implications for the retrieved Jovian vertical ethane distribution. Description: $^{1}$ T. Kostiuk, et al., Ap. J. 265, 564 (1983) see also T. Kostiuk, et al., BAAS, 17. 703 (1985). Address of Authors: Laboratory for Extraterrestrial Physics, NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771 Author Institution: URI: http://hdl.handle.net/1811/17063 Other Identifiers: 1986-TB-2