A fairly universal model is suggested for the calculation of the spectral c
haracteristics of nonequilibrium plasma whose nonequilibrium is associated
with the radiation yield. The model is based on the use of average atom app
roximations, although it may be readily generalized to the case of detailed
inclusion of ion configurations. For constructing interpolation under arbi
trary conditions, use is made of the spectral characteristics of plasma, ob
tained in advance for two limiting cases, namely, for transparent and nontr
ansparent plasma, as well as for the intermediate case, when the collision
and radiation processes play approximately the same role. The consistent in
clusion of the effect of radiation on the plasma composition enables one to
perform calculations for arbitrary values of the optical thickness of plas
ma layers.