Light induced fading in optically stimulated luminescence dots for medical dosimetry measurement

A subset of solid state materials have long been used as integrating dosimeters because they store energy deposited as a result of their interactions with ionizing radiation and then, when stimulated appropriately, release a proportionate amount of visible or near-visible light. During the 1960s, thermoluminescent dosimeters (TLDs), for which heat is used to extract the stored dosimetric signal, began to replace the photographic film as occupational dosimeters of record and for medical dosimetry. At the end of the twentieth century, a viable optically stimulated luminescent (OSL) material was developed which is now gaining in popularity as both an occupational and medical dosimeter. This paper reviews the related stored luminescence processes, presenting a simple conceptual model for optical absorption transitions in OSL materials along with a basic mathematical model for delayed luminescence. The approaches for extracting signal from the OSLs are enumerated.

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OPTICALLY STIMULATED LUMINESCENCE DATING OF POSTGLACIAL FLOODPLAIN SEDIMENTS IN IRELAND: IT IS LIKE ASSEMBLING A JIGSAW PUZZLE!

10.1130/abs/2019sc-327423 ◽

2019 ◽

Author(s):

Sebastien Huot ◽

◽

Ciara Fleming ◽

Jonathan Turner ◽

Mary Bourke

Keyword(s):

Optically Stimulated Luminescence ◽

Luminescence Dating ◽

Jigsaw Puzzle ◽

Optically Stimulated Luminescence Dating ◽

Floodplain Sediments

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Satellite-Based Personal UV Dose Estimation

Atmosphere ◽

10.3390/atmos12020268 ◽

2021 ◽

Vol 12 (2) ◽

pp. 268

Author(s):

Todd C. Harris ◽

Laurent Vuilleumier ◽

Claudine Backes ◽

Athanasios Nenes ◽

David Vernez

Keyword(s):

Measurement Errors ◽

Low Cost ◽

Public Health Research ◽

Mobile App ◽

Population Exposure ◽

Dose Estimation ◽

Annual Dose ◽

Significant Step ◽

Uv Dose ◽

Dosimetry Measurement

Epidemiology and public health research relating to solar ultraviolet (UV) exposure usually relies on dosimetry to measure UV doses received by individuals. However, measurement errors affect each dosimetry measurement by unknown amounts, complicating the analysis of such measurements and their relationship to the underlying population exposure and the associated health outcomes. This paper presents a new approach to estimate UV doses without the use of dosimeters. By combining new satellite-derived UV data to account for environmental factors and simulation-based exposure ratio (ER) modelling to account for individual factors, we are able to estimate doses for specific exposure periods. This is a significant step forward for alternative dosimetry techniques which have previously been limited to annual dose estimation. We compare our dose estimates with dosimeter measurements from skiers and builders in Switzerland. The dosimetry measurements are expected to be slightly below the true doses due to a variety of dosimeter-related measurement errors, mostly explaining why our estimates are greater than or equal to the corresponding dosimetry measurements. Our approach holds much promise as a low-cost way to either complement or substitute traditional dosimetry. It can be applied in a research context, but is also fundamentally well-suited to be used as the basis for a dose-estimating mobile app that does not require an external device.

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A High-Sensitivity Optically Stimulated Luminescence Scanning System for Measurement of Single Sand-Sized Grains

Radiation Protection Dosimetry ◽

10.1093/oxfordjournals.rpd.a032748 ◽

1999 ◽

Vol 84 (1) ◽

pp. 325-330 ◽

Cited By ~ 42

Author(s):

G.A.T. Duller ◽

L. B tter-Jensen ◽

P. Kohsiek ◽

A.S. Murray

Keyword(s):

High Sensitivity ◽

Optically Stimulated Luminescence ◽

Scanning System

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Probing The Transient Response To Improve The Stability Of Diamond Devices Under Pulsed Periodic Excitation

MRS Proceedings ◽

10.1557/proc-1039-p06-01 ◽

2007 ◽

Vol 1039 ◽

Author(s):

Philippe Bergonzo ◽

Hassen Hamrita ◽

Dominique Tromson ◽

Caroline Descamps ◽

Christine Mer ◽

...

Keyword(s):

Polycrystalline Diamond ◽

Pulse Generation ◽

Uniform Electric Field ◽

Device Stability ◽

Photon Pulse ◽

History Of ◽

Medical Dosimetry ◽

The Stability ◽

Detection Characteristics ◽

Time Of Flight Spectroscopy

AbstractCVD diamond combines attractive properties for the fabrication of detection devices operating in specific environments. One problem that remains critical for device stability is the presence of defect levels that alter the detection performances, and the detection characteristics often appear as they are very depending on time, temperature, and history of the preceding irradiations.One issue we have proposed is to adapt one technique that is commonly used for time of flight spectroscopy in order to maintain a uniform electric field in the probed device, and based on the synchronisation of the device bias with the period of the excitation source. This can be applied to several types of detection applications, as long as we can rely on periodical triggering in order to synchronise the device polarisation. We apply it here to a LINAC electron accelerator used for photon pulse generation at the frequency of 25Hz. The result is a remarkable improvement of the performance of a polycrystalline diamond detector that exhibits a particularly defective response when used in the steady state excitation, to reach that of a perfectly stable and reproducible device response in the pulsed mode. We claim this method to be applicable to several types of excitations and particularly to present a high interest for monitoring accelerator sources, e.g. for medical dosimetry applications.

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