ISO/ASTM 51608:2015,Practice for dosimetry in an X-ray (bremsstrahlung) facility for radiation processing at energies between 50 keV and 7.5 MeV.
ISO/ASTM 51608:2015 outlines the dosimetric procedures to be followed during installation qualification, operational qualification, performance qualification and routine processing at an X-ray (bremsstrahlung) irradiator.
5. Radiation source characteristics
5.1 X-radiation(bremsstrahlung) is a form of electromagnetic radiation, which is analogous to gamma radiation. Although its effects on irradiated materials are generally similar,it differs in energy spectrum, angular distribution, and dose.
5.2 The physical characteristics of the X-ray field depend on the design of the X-ray converter and the parameters of the electron beam striking the target, that is, the electron energy spectrum, average electron beam current, and beam current distribution on the target.
5.3 These aspects of X-radiation and its suitability for radiation processing are reviewed in more detail in Annex A1.