Beryllium Oxide As a Thermoluminescent Dosimeter

Tochilin, E.; Goldstein, Norman; Miller, William G.

doi:10.1097/00004032-196901000-00001

Cited by 99 publications

(28 citation statements)

References 2 publications

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“…The TL wavelength was 325 nm, and the emission was almost the same as the undoped BeO and Li-doped BeO. (1,11) That is, Na + as a dopant has no role for TL emission.…”

Section: Discussionmentioning

confidence: 92%

“…(1) Thermoluminescent phosphors based on BeO were then commercialized in 1975 by Yasuno et al, (2) due to their good thermoluminescence (TL) properties with high sensitivity, repeatability, low fading, tissue equivalency (Z eff = 7.1), and low neutron sensitivity. (3) Since then, there have been many reports on the properties and applications of thermoluminescent phosphors based on BeO.…”

Section: Introductionmentioning

confidence: 99%

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Thermoluminescence Glow Curve Analysis of Thermoluminescent Na-Doped BeO Phosphor Using a Postannealing Method with Very Low Heating Rate

2016

Sensors and Materials

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The thermoluminescent Na-doped BeO phosphor (Panasonic UD-170A) is one of the better thermoluminescent dosimeters due to its high sensitivity, tissue equivalency, and repeatability. However, there have only been a few reports on thermoluminescence (TL) glow component analysis, despite this being necessary to understand the physical characteristics of thermoluminescent phosphors based on BeO. In this study, the TL glow curve of the thermoluminescent Na-doped BeO phosphor was analyzed using a postannealing method with a very low heating rate of 0.1 °C s −1 . Although the TL glow curve for thermoluminescent Na-doped BeO phosphor was previously reported to consist of only a few components, our investigation analyzed at least thirteen components in the TL glow curve. In addition, the accuracy of the TL parameters calculated in this study was very high using a postannealing method with a very low heating rate.

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“…The TL wavelength was 325 nm, and the emission was almost the same as the undoped BeO and Li-doped BeO. (1,11) That is, Na + as a dopant has no role for TL emission.…”

Section: Discussionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Thermoluminescence Glow Curve Analysis of Thermoluminescent Na-Doped BeO Phosphor Using a Postannealing Method with Very Low Heating Rate

2016

Sensors and Materials

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“…The luminescence of BeO in the UV region below 370 nm, can be effectively stimulated by broadband blue light. The optical properties of BeO are well-known and were investigated by [6], [7] and [8]. Requirements placed on such systems are high rate of accuracy, a very robust and stable measuring procedure and a very good reproducibility as well as an easy and fast reading process.…”

Section: Introductionmentioning

confidence: 99%

Single photon detection and signal analysis for high sensitivity dosimetry based on optically stimulated luminescence with beryllium oxide

Radtke¹,

Sponner²,

Ch.³

et al. 2018

EPJ Web Conf.

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Single photon detection applied to optically stimulated luminescence (OSL) dosimetry is a promising approach due to the low level of luminescence light and the known statistical behavior of single photon events. Time resolved detection allows to apply a variety of different and independent data analysis methods. Furthermore, using amplitude modulated stimulation impresses time-and frequency information into the OSL light and therefore allows for additional means of analysis. Considering the impressed frequency information, data analysis by using Fourier transform algorithms or other digital filters can be used for separating the OSL signal from unwanted light or events generated by other phenomena. This potentially lowers the detection limits of low dose measurements and might improve the reproducibility and stability of obtained data. In this work, an OSL system based on a single photon detector, a fast and accurate stimulation unit and an FPGA is presented. Different analysis algorithms which are applied to the single photon data are discussed.Index Terms beryllium oxide, dosimetry, luminescence, optical stimulated luminescence, single photon detection

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“…These eight types which could be divided into tissue equivalent materials which imply Beryllium Oxide (BeO) [1], Lithium Borate (Li 2 B 4 O 7 ), Lithium Fluoride (LiF) [2], and Magnesium Borate (MgB 4 shown and expressed by Al-Haj & Lagarde [4], in a form of glow curve changes which they ascribed to phenomenon of fading which should be less than 5% [5] and the distortion of the glow curve due to anomalies in routine practice as shown in Figure 1. 2)…”

Section: Introductionmentioning

confidence: 99%

Studying of Common Factors Affecting Reading of Lithium Fluoride Thermo-Luminescence Dosimeter Crystal

Omer¹,

Alsayyari²,

Tamboul³

et al. 2017

OJBIPHY

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The aim of this study was to study the technical factors affecting the reading of TLD (LiF:Mg:Ti) for radiation dosimetry. The method adapted was an exposure of LiF:Mg:Ti crystal with γ-ray with the following filters (Hp 0.07 and Hp 10), before and after usage of filter Hp (0.07), annealing, cooling by nitrogen flux and crystal morphology by scanning electron microscope. The collected data analyzed by EXCELL software showed that: TLD average count/second (C/s) with filter Hp (10) was greater than that obtained with filter Hp (0.07) with an amount of 1191 c/s (19%). Also the analysis showed that: the average C/s without filter Hp (0.07) was greater than that with filter by an amount of 994.5 C/s (16.4%), and there was proportional linear relationship; as the applied dose increased the TLD C/s increased significantly (R 2 = 0.9) based on the equations: y = 885.1x − 286.5 and y = 860.5x + 856.8 for filtered and without filtered beam respectively, where x refers to applied dose in mGy and y refers to C/s. Also the average C/s without nitrogen flux (cooling) was greater than with nitrogen count with an amount of 52.4 C/s (11%). The annealing (without filter) causes a reduction in dose by 82.2 μGy (19.2%), and in case of annealing with filter, the dose reduced by 66.7 μGy (21.9%) relative to annealing without filter. The morphology of TLD crystal shown by scanning electron microscope SEM was a darkening surface after irradiation.

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Beryllium Oxide As a Thermoluminescent Dosimeter

Cited by 99 publications

References 2 publications

Thermoluminescence Glow Curve Analysis of Thermoluminescent Na-Doped BeO Phosphor Using a Postannealing Method with Very Low Heating Rate

Thermoluminescence Glow Curve Analysis of Thermoluminescent Na-Doped BeO Phosphor Using a Postannealing Method with Very Low Heating Rate

Single photon detection and signal analysis for high sensitivity dosimetry based on optically stimulated luminescence with beryllium oxide

Studying of Common Factors Affecting Reading of Lithium Fluoride Thermo-Luminescence Dosimeter Crystal

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