An approximate band model for radiative transfer in semitransparent solids

Edward E. Anderson

Research output: Contribution to journalArticlepeer-review


A simplified model for the spectral refractive index and absorption coefficient of semitransparent solids is developed from solid state lattice vibrational theory. This model accurately predicts the total band absorptance and total internal emittance for long pathlengths and selected solids. Total band absorptance is shown to be proportional to the square root of the pathlength when the pathlength is large. Comparison to exact results for α-quartz and lithium fluoride demonstrates that the total radiative transfer properties are accurately predicted by the model when the pathlength exceeds one millimeter.

Original languageEnglish
Pages (from-to)183-192
Number of pages10
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Issue number3
StatePublished - Mar 1979


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