Dose metrology: TLD/OSL dose accuracy and energy response performance

Belhaj, Omaima Essaad; Sadeq, Younes; Bellahsaouia, Meryeme; Boukhal, Hamid; Chakir, E.; Belhaj, Siham; Hadouachi, Maryam; Laazouzi, Khaoula; Tazi, Mohammed Fadl; Khoukhi, T. El

doi:10.1016/j.net.2022.10.029

Cited by 5 publications

(5 citation statements)

References 7 publications

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“…Therefore, the national secondary dosimetry laboratory (SSDL) of Morocco, which is a member of the WHO/IAEA network can irradiate samples for internal studies and the N-quality could be used in the SSDL for the calibration of different dosimeters [32,33].…”

Section: Discussionmentioning

confidence: 99%

Iso 4037 2019: Establishment of X-Ray Narrow-Spectrum Series Used in The National Secondary Standard Dosimetry Laboratory of Morocco

Belhaj¹,

Boukhal²,

Chakir³

et al. 2022

RAD Conference Proceedings

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The radiation qualities of the narrow-spectrum X-ray series in the range from 30 to 300 kV designed for calibration of radiation protection and dosimeter irradiation instruments have been established, characterized and validated experimentally in accordance with the recommendations of ISO4037-1:2019 in the automated X-ray calibration facility of the Service of Calibration and Metrology of Ionizing Radiation of a national Secondary Standard Dosimetry Laboratory (SSDL) in Morocco. The variety of the first half-value layer (1st HVL) and the second HVL (2nd HVL) between the experimental results and the values given in ISO 4037-1:2019 were all within 10%; similarly, the homogeneity coefficients h were between 0.88 and 1.0 according to ISO 4037:2019. In addition, the Monte Carlo code Gamos/Geant4 was used to simulate the spectra of these radiation qualities, which showed good agreement with the spectra given in ISO 4037-1 and with the results found by the SpekPy and SpekCalc software. For the conversion coefficients the highest difference between values determined through experiment and those established by ISO 4037-3 were 5.5 %. The study and characterization of the reference radiations of the narrow spectrum series in the national secondary standard dosimetry laboratory of Morocco revealed a good conformity to the recommendations of the ISO 4037:2019.

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Section: Discussionmentioning

confidence: 99%

Iso 4037 2019: Establishment of X-Ray Narrow-Spectrum Series Used in The National Secondary Standard Dosimetry Laboratory of Morocco

Belhaj¹,

Boukhal²,

Chakir³

et al. 2022

RAD Conference Proceedings

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“…The charge generated by the X-ray and gamma-ray photons was measured using a spherical ionization chamber PS (50) TN 32007S and read from an associated Unidos Webline T10023 PTW electrometer by including the calibration factor assigned to each beam quality and radionuclide sources [ 9 ].…”

Section: Methods Detailsmentioning

confidence: 99%

“…It is also a regulatory requirement for radiation-exposed workers to use only operational and tested control equipment when working with radioactive materials to ensure that radiation protection monitoring instruments can measure radiation dose with the accuracy required for their intended purpose [ 7 , 8 ]. In fact, if the dose of ionizing radiation absorbed by individuals at work is not controlled, people could face adverse health effects, specifically to their organs and DNA, depending on the duration radiation exposure, the distance from the source, the intensity of radiation and finally the sensitivity of the skin and exposed organs [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

GUI development for SSDL to calibrate photon measuring equipment

Belhaj,

Bellahsaouia

et al. 2023

MethodsX

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“…The functioning of TLDs and OSLs relies on the principle that the luminescence light intensity escalates proportionally to the absorbed radiation dose [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…Thermoluminescence (TL) and optically stimulated luminescence (OSL), which are commonly favoured and dependable methods for measuring radiation dose in medical, health physics, and industrial applications, stand out among the various techniques currently available [1, 2]. The functioning of TLDs and OSLs relies on the principle that the luminescence light intensity escalates proportionally to the absorbed radiation dose [3, 4].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of high‐sensitivity Dy,Eu co‐doped CaSO₄ thermoluminescent phosphor using coprecipitation technique

Mohamed,

Salama,

Alazab

et al. 2024

Luminescence

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In this work, (99 − x)CaSO4‐Dy2O3–xEu2O3, (where x = 0, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5) thermoluminescence phosphors were prepared using a coprecipitation method. The thermoluminescence (TL) dosimetry (TLD) characteristics such as TL sensitivity, dose–response, minimum detectable dose, thermal fading, and the effect of sunlight on the prepared phosphors were investigated. The obtained results indicated that the most sensitive phosphor was obtained at x = 0.05. Large thermal fading of 6% after 1 h and 26% after 24 h from irradiation followed by 71% after 1 month with no additional fading was observed within a time frame exceeding 2 months throughout the remaining duration of the investigation, which also spanned over 2 months. Despite the phosphor's high fading rate, the relative sensitivity of the prepared samples was ~90% compared with TLD‐100. The marked effect of day sunlight was also determined. High dose–response within the low‐dose range from 0.01 to 5 Gy was observed. The obtained results suggested that the synthesized phosphor is well suited for applications involving radiation biology and radiotherapy dosimetry.

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Dose metrology: TLD/OSL dose accuracy and energy response performance

Cited by 5 publications

References 7 publications

Iso 4037 2019: Establishment of X-Ray Narrow-Spectrum Series Used in The National Secondary Standard Dosimetry Laboratory of Morocco

Iso 4037 2019: Establishment of X-Ray Narrow-Spectrum Series Used in The National Secondary Standard Dosimetry Laboratory of Morocco

GUI development for SSDL to calibrate photon measuring equipment

Synthesis and characterization of high‐sensitivity Dy,Eu co‐doped CaSO₄ thermoluminescent phosphor using coprecipitation technique

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Dose metrology: TLD/OSL dose accuracy and energy response performance

Cited by 5 publications

References 7 publications

Iso 4037 2019: Establishment of X-Ray Narrow-Spectrum Series Used in The National Secondary Standard Dosimetry Laboratory of Morocco

Iso 4037 2019: Establishment of X-Ray Narrow-Spectrum Series Used in The National Secondary Standard Dosimetry Laboratory of Morocco

GUI development for SSDL to calibrate photon measuring equipment

Synthesis and characterization of high‐sensitivity Dy,Eu co‐doped CaSO4 thermoluminescent phosphor using coprecipitation technique

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Product

Resources

About

Synthesis and characterization of high‐sensitivity Dy,Eu co‐doped CaSO₄ thermoluminescent phosphor using coprecipitation technique