A comprehensive Monte Carlo study to design a novel multi-nanoparticle loaded nanocomposites for augmentation of attenuation coefficient in the energy range of diagnostic X-rays

• Autorzy: Sayyadi Elahe , Mesbahi Asghar , Zamiri Reza Eghdam , Nejad Farshad Seyyed

Identyfikatory

DOI

10.2478/pjmpe-2021-0033

• Języki publikacji: EN

Abstrakty

EN

Introduction: The present study aimed to investigate the radiation protection properties of silicon-based composites doped with nano-sized Bi₂O₃, PbO, Sm₂O₃, Gd₂O₃, WO₃, and IrO₂ particles. Radiation shielding properties of Sm₂O₃ and IrO₂ nanoparticles were investigated for the first time in the current study. Material and methods: The MCNPX (2.7.0) Monte Carlo code was utilized to calculate the linear attenuation coefficients of single and multi-nano structured composites over the X-ray energy range of 10–140 keV. Homogenous distribution of spherical nanoparticles with a diameter of 100 nm in a silicon rubber matrix was simulated. The narrow beam geometry was used to calculate the photon flux after attenuation by designed nanocomposites. Results: Based on results obtained for single nanoparticle composites, three combinations of different nano-sized fillers Sm₂O₃+WO₃+Bi₂O₃, Gd₂O₃+WO₃+Bi₂O₃, and Sm₂O₃+WO₃+PbO were selected, and their shielding properties were estimated. In the energy range of 20-60 keV Sm₂O₃ and Gd₂O₃ nanoparticles, in 70-100 keV energy range WO₃ and for photons energy higher than 90 keV, PbO and Bi₂O₃ nanoparticles showed higher attenuation. Despite its higher density, IrO₂ had lower attenuation compared to other nanocomposites. The results showed that the nanocomposite containing Sm₂O₃, WO₃, and Bi₂O₃ nanoparticles provided better shielding among the studied samples. Conclusions: All studied multi-nanoparticle nanocomposites provided optimum shielding properties and almost 8% higher attenuation relative to single nano-based composites over a wide range of photon energy used in diagnostic radiology. Application of these new composites is recommended in radiation protection. Further experimental studies are suggested to validate our findings.

Słowa kluczowe

EN

nanocomposite; radiation; attenuation coefficient; diagnostic X- rays; MCNPX

• Wydawca: Polskie Towarzystwo Fizyki Medycznej ; De Gruyter
• Czasopismo: Polish Journal of Medical Physics and Engineering
• Rocznik: 2021
• Tom: Vol. 27, Iss. 4
• Strony: 279--289
• Opis fizyczny: Bibliogr. 30 poz., rys., tab.

Twórcy

autor

Sayyadi Elahe

• Medical Radiation Sciences Research Team, Tabriz University of Medical Sciences, Iran

autor

Mesbahi Asghar

• Medical Radiation Sciences Research Team, Tabriz University of Medical Sciences, Iran

autor

Zamiri Reza Eghdam

• Radio-oncology Department, Shahid Madani Hospital, Tabriz University of Medical Sciences, Medical Radiation Sciences Research Team, Tabriz University of Medical Sciences, Iran

autor

Nejad Farshad Seyyed

• Radio-oncology Department, Shahid Madani Hospital, Tabriz University of Medical Sciences, Medical Radiation Sciences Research Team, Tabriz University of Medical Sciences, Iran

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