Effect of reinforcement phase loading on the dosimetry response of a Polycarbonate/Bismuth Oxide nanocomposite for beta particles

Malekie, Shahryar; Kashian, Sedigheh; Safdari, Seyed Musa; Akbari, Morteza; Shahvar, Arjang

doi:10.22034/rpe.2022.339504.1081

Document Type : Research Article

Authors

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

https://doi.org/10.22034/rpe.2022.339504.1081

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 30-102 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.

Highlights

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.

Keywords

20.1001.1.26456397.2022.3.2.3.2

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Radiation Physics and Engineering

Effect of reinforcement phase loading on the dosimetry response of a Polycarbonate/Bismuth Oxide nanocomposite for beta particles

References

References

Volume 3, Issue 2
May 2022
Pages 11-15

Effect of reinforcement phase loading on the dosimetry response of a Polycarbonate/Bismuth Oxide nanocomposite for beta particles

References

References

Volume 3, Issue 2May 2022Pages 11-15

Volume 3, Issue 2
May 2022
Pages 11-15