tailieunhanh - Effect of low dose gamma radiation on electric conductivity of LDPE and PMMA polymers

An experimental analysis of the effect of gamma and X-ray irradiation with dose rate -6mSv/h on low-density polyethylene (LDPE) and PMMA samples is presented. The focus of attention is on their DC conductivity as a dielectric of a capacitor. | Effect of low dose gamma radiation on electric conductivity of LDPE and PMMA polymers Engineering Solid Mechanics 8 2020 31-40 Contents lists available at GrowingScience Engineering Solid Mechanics homepage esm Effect of low dose gamma radiation on electric conductivity of LDPE and PMMA polymers N. Madania D. Sardaria M. Hosntalaba and P. Zobdehb a Department of Medical Radiation Engineering Science and Research Branch Islamic Azad University . Box 14515-775 Tehran Iran b Department of Physics Qom Branch Islamic Azad University Qom Iran ARTICLEINFO ABSTRACT Article history An experimental analysis of the effect of gamma and X-ray irradiation with dose rate h Received 9 July 2019 on low-density polyethylene LDPE and PMMA samples is presented. The focus of attention is Accepted 28 August 2019 on their DC conductivity as a dielectric of a capacitor. This system is based on the discharge of a Available online capacitor by radioactive radiation through ionization of the dielectric consists of an inner electrode 28 August 2019 Keywords of the capacitor. The experimental setup contains a special electronic circuit in which polymer Gamma irradiation samples are placed as dielectric of parallel-plate capacitor which is connected to electrodes and a Polymers high voltage power supply is in series with other components of the circuit. It is understood that Electrical properties the resistance of polymers varies with the applied voltage and absorbed gamma ray dose from 137Cs LDPE with MeV energy. The influences of this parameter on LDPE and PMMA electrical PMMA properties as a result of polarization of dielectric are also presented. The experimental results show elevation of LDPE and PMMA electric conduction properties as irradiation dose rate increases. Indications of predominance of charge accumulation are also observed. 2020 Growing Science Ltd. All rights reserved. 1. Introduction The question of reliability of modern electronic