Shahryar Malekie - Radiation Application Research School, Nuclear Science and Technology Research Institute, P. O. Box ۳۱۴۸۶۴۳۱۱۱, Karaj, Iran
Seyed Musa Safdari - Department of Nuclear Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
Sedigheh Kashian - Radiation Application Research School, Nuclear Science and Technology Research Institute, P. O. Box ۳۱۴۸۶۴۳۱۱۱, Karaj, Iran
Morteza Akbari - Department of Nuclear Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

Polycarbonate-bismuth oxide composite has been used as a beta-ray sensor in the previous works. Calculation of two main quantities namely stopping power and range of electrons in this material can be useful to evaluate the optimal thickness of the sensor. Thus, in this study, the range of electrons and stopping power of polycarbonate/bismuth oxide composite for several pure beta-emitters were estimated using the ESTAR program. Simulation findings indicated that the amount of concentration of the heavy metal oxide particles into the composite is an important factor to determine the range and stopping power of the electrons. Also, in the experimental phase, the response of the ۵۰ wt% nanocomposite with thickness of ۱ mm against the beta-rays of the P-۳۲ source at the average energy of ۶۹۵ keV in different activities was measured using an electrometer at a constant voltage of ۸۰۰ V. Results showed that the response of the sample ranging from ۴ to ۶ mCi was linear with R۲= ۰.۹۷۵۷.

Beta sensor, ESTAR Program, PC-Bi۲O۳ nanocomposite, Phosphorus-۳۲, Stopping Power