Investigation of emission spectra, dose response and stability of luminescence from NaCl

Hunter, Peter G.; Spooner, Nigel A.; Smith, B.W.; Creighton, D.F.

doi:10.1016/j.radmeas.2012.01.005

Cited by 35 publications

(12 citation statements)

References 8 publications

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“…The test parameters used were 5 Gy beta dose using a Daybreak irradiator with 40 mCi 90 Sr/ 90 Y plaque β source followed by immediate glow to 400 ⁰C @ 5 ⁰C/s heating rate, reheat for background subtraction and PMT quantum efficiency correction. The results for Saxa, Coles, ISM and Diamond salt samples were previously presented as contour plots of the TL emissions by Hunter et al, 2012 as a part of a larger sample study of NaCl luminescence. An order of magnitude of the luminescence intensity (z axis) is represented by the displayed contour lines, referenced to the peak emission intensity .…”

Section: Apparatusmentioning

confidence: 99%

“…Many examples of salt crystallised in solar ponds exhibit an enhanced 590 nm TL peak, typically an order of magnitude larger than any 420 nm and 360 nm TL emissions (Spooner et al, 2011Hunter et al, 2012). In comparison, samples that were mined from rock salt have very much weaker 590 nm emissions, if present .…”

Section: Introductionmentioning

confidence: 99%

“…Subsequent reports include characterisation of blue stimulated OSL (Bailey et al, 2000, Thomsen et al, 2002, UV (360 nm) TL (Rodriguez-Lazcano et al, 2012), blue (420 nm) TL (Gartia et al, 2004), orange (590 nm) TL, blue stimulated OSL, IRSL (Spooner et al, 2011), TL kinetics (Gartia et al, 2012), 590 nm TL and fading performance . In general it has been shown that luminescence suitable for dosimetric purposes has been found in a wide range of NaCl samples (Spooner et al, 2011;Timar-Gabor and Trandafir, 2013;Gartia et al, 2004;Murthy et al, 2006;Hunter et al, 2012;Christiansson et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the role of the production process on the luminescence of sea salt products

Hunter

Spooner

2017

Geochronometria

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Luminescence dosimetry assumes samples of a given material with diverse provenances behave in a predictable manner, allowing a standardised testing protocol, such as SAR for quartz, to be employed. This article demonstrates that distinct salt products derived from a single manufacturer's feedstock retain comparable luminescence behaviour. This is the basis of a standardised test protocol: uniting testing procedures which have been shown to be individually applicable. Generalization across samples from different manufacturers and processes is currently under investigation. Luminescent evaluation of five samples produced by Cheetham & Co. gave useful intensities for all emission bands (590 nm, 420 nm and 360 nm TL and blue stimulated OSL), with the spectral and intensity balance of emissions generally similar for each sample. 590 nm emission sensitization was noted after preheating samples to 135°C and 300°C for five minutes. But, the 360 nm TL emission from feedstock salt was a factor of five greater than the same signal from the other processed samples despite the OSL intensity being similar to the other samples. Spectrum variation between aliquots as measured by the 3D TL spectrometer was also investigated and found to be minimal for both the first and second TL glow cycles.

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Section: Apparatusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of the role of the production process on the luminescence of sea salt products

Hunter

Spooner

2017

Geochronometria

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“…Prior studies on optically stimulated luminescence (OSL) dosimetry involving luminescent materials have shown that ordinary household salt (NaCl) has potential applications both in retrospective dosimetry (Bailey et al 2000 ; Bernhardsson et al 2009 ; Spooner et al 2011 ; Hunter et al 2012 ; Ademola 2017 ) and prospective dosimetry (Bernhardsson et al 2012 ; Ekendahl et al 2016 ; Christiansson et al 2018 ; Waldner and Bernhardsson 2018 ; Majgier et al 2019 ). As NaCl is easily accessible all over the world, it could be an available and cost-effective complement to commercially available dosimeters in applications where a large number of dosimeters is needed or when there is a shortage of other available means for in situ or individual dosimetry.…”

Section: Introductionmentioning

confidence: 99%

NaCl pellets for prospective dosimetry using optically stimulated luminescence: Signal integrity and long-term versus short-term exposure

Waldner

Rääf

Bernhardsson

2020

Radiat Environ Biophys

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Optically stimulated luminescence (OSL) signal properties of pellets from three types of NaCl (two household salts and one analytical grade salt) were investigated for their use in prospective dosimetry. Special attention was given to the OSL signal behaviour with time. The readout protocol was optimised in terms of preheat temperature, and the OSL signal yield of the NaCl pellet with time as well as the fading of the OSL signal with time was investigated. The effects of acute and chronic irradiations were compared. Irradiations and readout were performed using a Risø TL/OSL reader (TL/OSL-DA-15, DTU Nutech, Denmark). The optimal preheat temperature was determined to be 100 ºC, yielding OSL signals similar to a 1 h pause before OSL signal readout. There was no OSL signal fading observed as a function of time, but a decrease in the OSL signal yield of the NaCl pellets with time resulted in an apparent inverse fading when converting the OSL signal to an absorbed dose. For chronic radiation exposures of up to five weeks, the sensitivity of the NaCl pellets was found to be stable. The results of this study show that the use of NaCl pellets for prospective dosimetry is a promising, cost-effective, and accessible complement to commercially available alternatives for accurate absorbed dose determinations.

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“…When the irradiated phosphor is heated the electrons and holes release from their respective trapped sites and re-combine with their counter parts; as a result annihilation takes place in the form of phosphorescence. Polycrystalline phosphors exhibit a glow curve, which is thermoluminescence intensity versus temperature plot, with single or multiple peaks (Berezovskaya et al, 2007;Manam and Das, 2010;Sharma et al, 2010;Ranogajee-Komor and Osvay, 1986;Murthy et al, 2006;Hunter et al, 2012). The glow curve provides the TL parameters as activation energy (E) frequency factor (s) and order of kinetics (b) (Chen, 1969;Li et al, 2005;Chandrasekhar et al, 2012;Sangeeta, 2004).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and thermoluminescence properties of SrAl 2 O 4 (EU) phosphor irradiated with cobalt-60, 6 MV and 16 MV photon beams

Pathak

Kurchania

2015

Radiation Physics and Chemistry

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Investigation of emission spectra, dose response and stability of luminescence from NaCl

Cited by 35 publications

References 8 publications

Investigation of the role of the production process on the luminescence of sea salt products

Investigation of the role of the production process on the luminescence of sea salt products

NaCl pellets for prospective dosimetry using optically stimulated luminescence: Signal integrity and long-term versus short-term exposure

Synthesis and thermoluminescence properties of SrAl 2 O 4 (EU) phosphor irradiated with cobalt-60, 6 MV and 16 MV photon beams

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