Far Infrared Absorption In Liquefied Gases

Experimental results are given for the absorption coefficient of the liquids hydrogen (three para concentrations), nitrogen, oxygen, carbon monoxide, methane and argon in the wavenumber range 20-250/cm (40-500 milli micros).In addition, data for liquid hydrogen are given at wave numbers up to 600/cm (16.7 milli micros). The results are discussed in terms of the induced dipole, and, in the case of carbon monoxide, the permanent dipole.An indication of the way in which the data may be employed in calculations of thermal radiative transfer is made by calculation of the modified Planck mean absorption coefficient.(Author).