Title of article :
Effect of reinforcement phase loading on the dosimetry response of a Polycarbonate/ Bismuth Oxide nanocomposite for beta particles
Author/Authors :
Malekie, Shahryar Radiation Application Research School - Nuclear Science and Technology Research Institute, Karaj, Iran , Kashian, Sedigheh Radiation Application Research School - Nuclear Science and Technology Research Institute, Karaj, Iran , Safdari, Musa Department of Nuclear Engineering - Science and Research Branch - Islamic Azad University, Tehran, Iran , Akbari, Morteza Department of Nuclear Engineering - Science and Research Branch - Islamic Azad University, Tehran, Iran , Shahvar, Arjang Radiation Application Research School - Nuclear Science and Technology Research Institute, Karaj, Iran
Abstract :
In this experimental work, Polycarbonate/Bismuth Oxide (PC-Bi2O3) nanocomposites
were prepared in various concentrations of 0, 10, 30, and 50 wt% with thicknesses of 1
mm and irradiated by a pure beta-emitter source of Sr-90. To fabricate the electrodes,
copper sheets with thickness of 100 μm were attached to the top and bottom surfaces
of the samples using the silver paste. Then, electric current as the dosimetry response,
was measured at various dose rates ranging from 30 to 102 mSv.h−1 at a fixed voltage
of 400 V using an electrometer. Results showed that increasing the Bi2O3 wt% led to
improvement in the dosimetry response linearly at various dose rates. Also, the amounts
of sensitivities for the samples of 0, 10, 30, and 50 wt% were measured as 20.3, 19.8, 28.6,
and 36.7 nC.mSv−1.cm−3, respectively. Regarding the mechanism of beta interaction
with a polymer-heavy metal oxide nanocomposite, the Bremsstrahlung radiation can be
considered as a dominant effect.
Keywords :
Beta-ray Dosimeter , PC-Bi2O3 nanocomposite , Dose Rate , Sr-90 , Sensitivity
Journal title :
Radiation Physics and Engineering
