Optimizing radiation dosimetry: Impact of PMMA layers on electronic equilibrium for the calibration of radiation protection instruments.

Autor: Zidouz T; LPMS, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco; National Centre for Nuclear Energy, Science and Technology, Rabat, Morocco. Electronic address: zidouz@gmail.com., Talbi A; National Centre for Nuclear Energy, Science and Technology, Rabat, Morocco., Chakir EM; LPMS, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco., Alibrahmi E; LPMS, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco., Zaryah M; National Centre for Nuclear Energy, Science and Technology, Rabat, Morocco., Allach A; National Centre for Nuclear Energy, Science and Technology, Rabat, Morocco., Didi A; National Centre for Nuclear Energy, Science and Technology, Rabat, Morocco., Abarane A; Higher Institute of Health Sciences, Settat, Morocco.
Jazyk: angličtina
Zdroj: Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine [Appl Radiat Isot] 2025 Jan; Vol. 215, pp. 111588. Date of Electronic Publication: 2024 Nov 14.
DOI: 10.1016/j.apradiso.2024.111588
Abstrakt: In radiation dosimetry, achieving electronic equilibrium is vital for accurate dose measurements in radioprotection. This study investigates the effect of Poly Methyl Methacrylate (PMMA) layers, known by its chemical formula C 5 H 8 O 2 and a density of 1.19 g/cm³ (PNNL, 2011), on electronic equilibrium for the calibration of radiation protection instruments, focusing on photon beams of varying energies. Using DOSIMEX 2.0 simulation software, we modeled the influence of PMMA thickness on calibration factors across different X-ray and gamma-ray beam energies. Experimental validation with Cs-137 and Co-60 sources confirmed the reliability of the simulation. Our results highlight that while PMMA layers have a minimal impact on calibration for higher-energy beams, their role becomes significant for energies below 40 keV. For X-ray beams (From 30 to 140 kV), the results show minimal calibration factor deviation (<1.6%), whereas radionuclide beams exhibit more significant variations (4.1%), necessitating customized calibration approaches. This study underscores the importance of adhering to ISO 4037-3 standards in radioprotection, particularly in low-energy scenarios, to ensure the precision of calibration procedures and optimize radiation protection practices. Furthermore, based on the results obtained, the absence of PMMA does not have a dramatic effect on the calibration of X-ray radiation instruments, whereas for gamma-ray beams, it has a significant impact.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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