Research Paper
Year: 2022 | Month: June | Volume: 9 | Issue: 6 | Pages: 53-58
DOI: https://doi.org/10.52403/ijrr.20220608
The Effectiveness of Bi2O3 Apron on Attenuation of X-Ray and Gamma Ray by MCNPX Simulation
Veronika Dyah Suryanti, Eko Hidayanto, Fajar Arianto
1Department of Physics, Diponegoro University, Semarang, Indonesia.
Corresponding Author: Eko Hidayanto
ABSTRACT
Apron is one of the radiation shields, generally the apron used in radiodiagnostic installations is made of lead. However, lead aprons have disadvantages such as toxicity and relatively heavy weight. Therefore, it is necessary to innovate apron materials that are better than lead. This research was conducted by modelling an apron made of Bi2O3 with polyvinyl chloride as a coating and Pb as a standard apron. The used energies are 60, 90 & 120 keV for X-rays, 662 keV for Cs-137 (gamma ray), and 1173 and 1333 keV for Co-60 (gamma rays). The thickness of the radiation barrier is from 0.5 to 4 cm, and the distance of radiation source and detector is 45 cm. Bi2O3 apron geometry modelling was carried out using the MCNPX program. The modelling results show that at X-ray energy of 60 keV, the Bi2O3 apron can replace the Pb apron at a thickness of 1 cm to 4 cm. While at X-ray energy of 90 keV, the Bi2O3 apron can replace the Pb apron at a thickness of 2,5 cm to 4 cm, and at X-ray energy of 120 keV Bi2O3 apron can replace the Pb apron at a thickness of 1,5 cm to 4 cm. From these results it can be seen that the technology apron made from Bi2O3 with polyvinyl chloride as a coating with a certain thickness can be a non-lead radiation shielding material that is more environmentally friendly. But at the gamma energy of Cs-137 of 662 keV, Co-60 of 1173 keV and 1333 keV, Bi2O3 apron cannot replace Pb apron because the absorption of gamma rays is smaller than the absorption of X-rays.
Keywords: Bi2O3 apron, X-ray attenuation, Gamma ray attenuation, MCNPX .
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