Measurement of the Absorbed Energy by a Compensation Type Calorimeter

Abstract

A compensation type calorimeter has been devised in order to measure the absorbed energy of various materials irradiated by electron beams of 1.5 Me V generated from a Van de Graaf type accelerator. The measurements made proved that the calorimeter served as a practical and satisfactory instrument for this purpose.
Using 1.5 Me V electron beams, the energy absorption coefficient for polyvinyl chloride sheet of loo mg/cm² in thickness was found to be 9.8%, and the value was 12.1%, 7.2%, 9.4%, and 13.9% for polyethylene sheet, polyethylene powder, tetron sheet, and water, respectively.
The spatial distributions of the energy dissipation of 1.5 Me V electron beams in polyvinyl chloride, polyethylene were also measured by the same method.