Abstract

An empirical equation for calculating the effective maximum and average energy of beta particles after backscattering is derived from their absorption characteristics. For a beta emitter of maximum energy E m and average energy E , the effective maximum and average energies after scattering, E s and E s are given by: E s /E m = (158 + Z)/251, and; E s / E = (123 + Z)/216 , where Z is the atomic number of the scattering material.

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