THE ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 86:713-870, 1993 June

MID- AND FAR-INFRARED SPECTROSCOPY OF ICES: OPTICAL CONSTANTS AND INTEGRATED
                                  ABSORBANCES

   D. M. HUDGINS, S. A. SANDFORD, L. J. ALLAMANDOLA, AND A. G. G. M. TIELENS
           NASA/Ames Research Center, MS 245-6, Moffett Field, CA 94035


                                   ABSTRACT

       Laboratory spectra through the mid-infrared (4000 to 500 cm^-1 [2.5-20
    micron]) have been used to calculate the optical constants (n and k) and
    integrated absorption coefficients (A) for a variety of pure and mixed
    molecular ices of relevance to astrophysics.  The ices studied were H2O,
    CH3OH, CO2, OCS, CH4, CO2+CH4, CO2+OCS, CO+CH4, CO+OCS, O2+CH4, O2+OCS,
    N2+CH4, N2+OCS, H2O+CH4, H2O+OCS, and H2O+CH3OH+CO+NH3. In addition, the
    measurements have been extended through the far-infrared (500 to 50 cm^1
    [20-200 micron]) for the H2O, CH3OH, and H2O+CH3OH+NH3 ices.


    Subject headings:  line: identification -- molecular data