Abstract
The purpose of this work is to present a method for the calculation of secondary electron spectra generated by photons in water vapour in the energy region from 10 eV to 10 MeV. The cross sections below and above 1 keV have been treated separately. Examples are given for secondary electron spectra for low-energy photons, < 100 eV, in which all electrons are photoelectrons, and at higher energy regions, such as for 60Co photons. The spectrum of the first generation of secondary electrons, produced by 60Co photons, which are mainly due to incoherent scattering, was fitted with a set of polynomial functions which can be used as input for electron radiation action calculations.
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