Passive optically stimulated luminescence dosimetry

Bøtter‐Jensen, L.; McKeever, S.W.S.; Wintle, A.G.

doi:10.1016/b978-044450684-9/50091-x

Cited by 283 publications

(414 citation statements)

References 28 publications

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“…The present study reports the results of H p (10) and H p (0.07) [6,7] of the OSL dosimeter, in comparison with the TLD-100H and TLD-100. The aspects that are being studies were the energy response and the dose accuracy.…”

Section: Introductionmentioning

confidence: 99%

OSLD energy response performance and dose accuracy at 24 - 1250 keV: Comparison with TLD-100H and TLD-100

Kadir

Priharti

Samat

et al. 2013

AIP Conference Proceedings

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Section: Introductionmentioning

confidence: 99%

OSLD energy response performance and dose accuracy at 24 - 1250 keV: Comparison with TLD-100H and TLD-100

Kadir

Priharti

Samat

et al. 2013

AIP Conference Proceedings

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“…OSL emission occurs when light of appropriate wavelength incides on a previously irradiated insulator or semiconductor material 3,[34][35] . The stimulation light (usually green or blue light), then excites the trapped electrons, and the relaxation involves emission of light with shorter wavelength 34 .…”

Section: Introductionmentioning

confidence: 99%

Potential application of metal nanoparticles for dosimetric systems: Concepts and perspectives

Guidelli

Baffa

2014

AIP Conference Proceedings

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Abstract. Metallic nanoparticles increase the delivered dose and consequently enhance tissue radio sensitization during radiation therapy of cancer. The Dose Enhancement Factor (DEF) corresponds to the ratio between the dose deposited on a tissue containing nanoparticles, and the dose deposited on a tissue without nanoparticles. In this sense, we have used electron spin resonance spectroscopy (ESR) to investigate how silver and gold nanoparticles affect the dose deposition in alanine dosimeters, which act as a surrogate of soft tissue. Besides optimizing radiation absorption by the dosimeter, the optical properties of these metal nanoparticles could also improve light emission from materials employed as radiation detectors. Therefore, we have also examined how the plasmonic properties of noble metal nanoparticles could enhance radiation detection using optically stimulated luminescence (OSL) dosimetry. This work will show results on how the use of gold and silver nanoparticles are beneficial for the ESR and OSL dosimetric techniques, and will describe the difficulties we have been facing, the challenges to overcome, and the perspectives.

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“…Traditionally, OSL measurements use a constant, continuous flux of incident photons (CW-OSL); this results in a signal that usually shows monotonic decay with time. The OSL technique is widely used for estimation of absorbed dose from ionising radiation in wide ranging applications related to nuclear accidents, cosmic radiation in space, radiation facilities in health and power sectors, and in geochronology, i.e., dating sediments during the last 0.5 million years or so (see Bøtter-Jensen et al, 2003 for an overview).…”

Section: Introductionmentioning

confidence: 99%

Towards multi-exponential analysis in optically stimulated luminescence

Ankjærgaard¹,

Jain²,

Hansen³

et al. 2010

J. Phys. D: Appl. Phys.

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Optically Stimulated Luminescence (OSL) data from quartz can follow different mathematical forms depending on the stimulation mode. These data can be described in terms of different multi-exponential models and can be numerically fitted using several well-known methods. Here we make a comparative analysis of the performance and stability of two models, the decay and peak form, and we consider different transformation methods for obtaining the peak form. For the numerical computations we use a nonlinear least squares (NLS) method and a method based on a first-kind Fredholm integral equation (FIE). Our analysis uses artificial data with three components (seven parameters including the background), and ten different levels of background, both the signal and the background contain Poisson distributed noise.Parameters derived using both models are acceptable (statistically consistent and on an average within ~1% of the expected value) and no obvious preference is observed for any particular model, although there may be a suggestion that peak form data shows a smaller mean bias. This conclusion seems to be independent of the type of peak transformations investigated here. Furthermore, it is found that transformation of OSL decay data to a peak form gives better results than direct measurement of peak form data by, for example, varying the stimulation light intensity. The comparison of the two numerical methods suggests that the NLS method performs somewhat better than the FIE method; however, the latter has the advantage that it does not require the 2 user's judgement on the number of components in the data. Testing of the NLS procedure on a measured quartz time-resolved OSL signal (TR-OSL) transformed into peak form yielded reliable parameter estimates even when the signal intensity was deliberately reduced by a factor of sixteen.

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Passive optically stimulated luminescence dosimetry

Cited by 283 publications

References 28 publications

OSLD energy response performance and dose accuracy at 24 - 1250 keV: Comparison with TLD-100H and TLD-100

OSLD energy response performance and dose accuracy at 24 - 1250 keV: Comparison with TLD-100H and TLD-100

Potential application of metal nanoparticles for dosimetric systems: Concepts and perspectives

Towards multi-exponential analysis in optically stimulated luminescence

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