DefaultMean - The default implementation of the mean fluorescence yield
based on a blend of Bambynek 1972 for K & L families and Oz 1999 for the M
family.
defineByMaterialFraction - Extends defineByMaterialFraction to also
compute the density based on the amount of each base material and the
density of the base material.
DetectorType - Type of X-ray Detector, Allowed values are (EDSDET in DTSA)
SIBEW = Si(Li) with Be Window SIUTW = Si(Li) with Ultra Thin Window SIWLS =
Si(Li) Windowless GEBEW = Ge with Be Window GEUTW = Ge with Ultra Thin
Window GEWLS = Ge Windowless