Infra-Red Emission Spectra of Hot Liquids

Publisher Website
Google Scholar
Abstract
When a liquid is heated as a thin film, specific infra‐red emission bands are observed, most of which are of the same wave‐length as the absorption bands of the material. These emission bands are rapidly obscured by the background radiation as the thickness of the film is increased. The optimum sample thickness is of the order of 0.001 inch with most of the bands being obscured at thicknesses of 0.010 inch. The intensity of any band increases with temperature in accordance with the equation N1=N0e−E/RT. The value of E calculated from this equation has been found to agree in most cases with that calculated from the wave‐length of the emission band. Certain bands have been observed which are not equivalent in emission and absorption. It has been tentatively suggested that these may be explained on the basis of overtone and combination bands.

This publication has 3 references indexed in Scilit: