EFFECTS OF GAMMA IRRADIATION ON ELECTRICAL PROPERTEIS OF POLYVINYL CHORIDE (PVC) SAMPLES

Abstract

The electrical properties that are of major importance to the operation and lifetime of many electrical components and systems include the relative dielectric constant and relative permittivity, these properties are dependent on the chemical composition of the dielectric, they usually suffer degradation after electrical deterioration has taken place. The aim of this paper is to use the change in electrical properties with radiation dose to design polymer dosimeter. The experimental results show an improvement the relative permittivity of the medium decreased except for PE sample which increased when the total irradiation dose of gamma rays was increased whereas the relative dielectric constant increased for all PVC samples. The predominance of cross-linking results shows linear relations between relative permittivity and relative dielectric constant versus absorbed dose of gamma rays source. These relationships between these properties and dose level can be utilized as measuring tool (Dosimeter) for radiation exposure that incident on the PVC samples.