  Thermal diffusivity measurements of samples transmitting thermal radiation
require adjustments to the data treatment procedures in laser flash analysis.
Conventionally, an unconstrained diathermic model is used. Current results show
that the alternative coupled radiative-conductive models produce substantially
different results -- for instance, at high temperatures in oxide ceramics.
However, care must be taken to ensure accurate implementations of each
constituent computational technique. The latter are presented in this work.
