ENERGY-SPECTRA OF SECONDARY ELECTRONS IN WATER-VAPOR

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