Optically stimulated luminescence of natural NaCl mineral from Dead Sea exposed to gamma radiation

Roman-Lopez, J.; Lopez, Yadira; Cruz-Zaragoza, E.; Marcazzó, J.

doi:10.1016/j.apradiso.2017.05.001

Cited by 9 publications

(1 citation statement)

References 15 publications

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“…It is formed by salty water vaporization, which contains dissolved sodium ions and chlorine ions. Table salt and rock salt (Halite) also gained attention in many studies recently (Ademola, 2017;Amer, 2017;Druzhyna, Datz, Horowitz, Oster, & Orion, 2016;Elashmawy, 2018;Khazal & Abul-Hail, 2010;Roman-Lopez, López, Cruz-Zaragoza, & Marcazzó, 2018;Spooner, Smith, Creighton, Questiaux, & Hunter, 2012;Spooner et al, 2011;Yüce & Engin, 2017) as accidental and retrospective dosimetry as it is readily available anywhere and does not require unique treatments before measurement.…”

Section: Introductionmentioning

confidence: 99%

Retrospective dosimetry using Egyptian halite (NaCl)

Shahein

Hafez

Abdou

2019

Journal of Radiation Research and Applied Sciences

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Thermoluminescence (TL) sensitivity studied for some Egyptian halite (NaCl) samples. Three natural rock salts collected from Fayoum Governorate, Qattara Depression, and Siwa Oasis and two commercial salts (Table salt and Analytical NaCl) were studied for potential application to retrospective dosimetry. The chemical compositions of the samples were analyzed by using EDX technique. The Kinetic parameters were estimated by using peak shape method for general order. The deconvolution process for the glow curves was done using the peak fit program. The chemical analyses observe a difference in the trace impurities according to the collection area of the samples. All samples have three peaks (P1, P2, and P3) but the two peaks P2 and P3 suffered overlapping in case of table salt and Fayoum Governorate. The response curves are linear from, 10 up to 100 Gy for Table salt; Analytical salt and Siwa halite, in contrast, the dose-response curves for Qattara Depression and Fayoum halite are linear from 0.8 up to 100 Gy. The TL signal fading of the samples ranged from 21% to 34%, from the initial signal. The experimental results and the estimated kinetic parameters can be dedicating the ability to use the five investigated salt samples as a retrospective dosimetry.

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Section: Introductionmentioning

confidence: 99%

Retrospective dosimetry using Egyptian halite (NaCl)

Shahein

Hafez

Abdou

2019

Journal of Radiation Research and Applied Sciences

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Natural dead sea salt and retrospective dosimetry

Wahib

Sani

Ramli

et al. 2020

Radiat Environ Biophys

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Accidents resulting in widespread dispersal of radioactive materials have given rise to a need for materials that are convenient in allowing individual dose assessment. The present study examines natural Dead Sea salt adopted as a model thermoluminescence dosimetry system. Samples were prepared in two different forms, loose-raw and loose-ground, subsequently exposed to 60 Co gamma-rays, delivering doses in the range 2-10 Gy. Key thermoluminescence (TL) properties were examined, including glow curves, dose response, sensitivity, reproducibility and fading. Glow curves shapes were found to be independent of given dose, prominent TL peaks for the raw and ground samples appearing in the temperature ranges 361-385 ºC and 366-401 ºC, respectively. The deconvolution of glow curves has been undertaken using GlowFit, resulting in ten overlapping first-order kinetic glow peaks. For both sample forms, the integrated TL yield displays linearity of response with dose, the loose-raw salt showing some 2.5 × the sensitivity of the ground salt. The samples showed similar degrees of fading, with respective residual signals 28 days post-irradiation of 66% and 62% for the ground and raw forms respectively; conversely, confronted by light-induced fading the respective signal losses were 62% and 80%. The effective atomic number of the Dead Sea salt of 16.3 is comparable to that of TLD-200 (Z eff 16.3), suitable as an environmental radiation monitor in accident situations but requiring careful calibration in the reconstruction of soft tissue dose (soft tissue Z eff 7.2). Sample luminescence studies were carried out via Raman and Photoluminescence spectroscopy as well as X-ray diffraction, ionizing radiation dependent variation in lattice structure being found to influence TL response.

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