ABSTRACT
Table M.2a through Table M.2z give stopping powers, ranges and radiation yields for
electrons in a number of materials of medical interest. Elements have been placed first (a-f),
then compounds (g-i), in order of increasing I-value (see below), then mixtures (j-q) and body
tissues (r-z), in alphabetical order. The electron energies extend from 0.01 MeV (10 keV) up
to 50 MeV, covering the range of interest in radiotherapy; at energies below 10 keV the
validity of the Bethe-Bloch expression for the mass collision stopping power becomes ques-
tionable, especially in high atomic-number materials. The values have been obtained using the
ESTAR computer code, accessed via https://physics.nist.gov/PhysRefData/Star/Text/ESTAR.
html where full details of the calculational procedures are given (Berger et al. 2005).
