Measurement of the total stopping power of 5.3 MeV electrons in polystyrene by means of electron beam absorption in ferrous sulphate solution

摘要

Describes how an experimental arrangement for the calibration of Fricke solution in terms of absorbed dose to water can be utilised to determine total, i.e. collisional and radiative, mass stopping power of high-energy electrons. As a first result the measurement of the total mass stopping power of polystyrene at about 5.3 MeV kinetic electron energy is presented in detail. Comparison of the obtained value with the corresponding result of recent theoretical computations shows agreement within the measurement uncertainty of about 1.2 (SD).