An international journal published by K. N. Toosi University of Technology

Document Type : Research Article


1 Radiation Application Research School, Nuclear Science and Technology Research Institute, Karaj, Iran

2 Department of Nuclear Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran


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 30-102 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, respectively. Regarding the mechanism of beta interaction with a polymer-heavy metal oxide nanocomposite, the Bremsstrahlung radiation can be considered as a dominant effect.


  • PC/Bi2O3 nanocomposites at various Bi2O3 weight fractions up to 50 wt% are prepared via the solution method.
  • The samples are exposed to beta rays of Sr-90 at various dose rates ranging from 30 to 102 mSv.h-1.
  • Variation of electric current during the irradiation is measured as the dosimetry response of the samples.
  • Increasing the Bi2O3 wt% leads to improvement in the sensitivity and dosimetry response linearly at various dose rates.


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