Abstract
An emissivity model is built for the case of a planar shock wave propagating into an originally transparent sample, which is sandwiched between a baseplate and a rear wall. The model shows that the widely accepted/used method of obtaining emissivity by 1- Rs is inaccurate in some cases and needs to be replaced by (1- Rs)/(1- Rs Rw). It is also given how the reflectivity of the shock wave front (Rs), that of the baseplate surface (Rb) and that of the rear wall (Rw) alter the time dependent emissivity of the shock-compressed sample, which should be helpful for the target design of shock experiments.
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