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Radiation components of steady-state scattering Dusty plasma at low pressure

Abstract Relations between the components of stationary radiation intensity in radiating, absorbing, and scattering media are derived. Every component is equal to the response of intensity to initial radiation of some definite part of a radiator. Dusty plasma represents an example of such radiator. The relations are obtained from the condition of a steady state in general form. Some particular cases are discussed. The relations between the components are fairly simple. In the simplest useful in practice case, they present the following statement: the sum of all relative components of observed intensity is equal to unity. The relations do not depend on many specific characteristics of the radiator although every component depends on these characteristics strongly. In contrast to the previous results, the relations are valid in gases and plasma at low pressure. The relations are useful in analysis of various experiments, particularly, in spectral diagnostics. The method of experimental determining relative populations of the atomic energy levels in dusty plasma is discussed.