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Articoli di riviste sul tema "Thermoluminescence dosimetry"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 4 febbraio 2022

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1

Bhatt, B. C., e M. S. Kulkarni. "Thermoluminescent Phosphors for Radiation Dosimetry". Defect and Diffusion Forum 347 (dicembre 2013): 179–227. http://dx.doi.org/10.4028/www.scientific.net/ddf.347.179.

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The use of thermoluminescence (TL) as a method for radiation dosimetry of ionizing radiation has been established for many decades and has found many useful applications in various fields, such as personnel and environmental monitoring, retrospective dosimetry, medical dosimetry, space dosimetry, high-dose dosimetry. Method of preparation, studies and applications of thermoluminescence (TL) dosimetric materials are reviewed. Several high sensitivity thermoluminescent dosimeters (TLDs) are now commercially available in different physical forms. These commercial TL dosimeters comply with a set of stringent requirements stipulated by the International Electrotechnical Commission (IEC). Specific features of TL phosphors for thermal neutron, fast neutron and high-energy charged particle (HCP) dosimetry are also considered. Some of the recent developments in the field of optically stimulated luminescence (OSL) and radiophotoluminescence (RPL) are also summarized. Comparative advantages of TL, OSL and RPL dosimeters are given. Results of recent studies of TL in nanosized materials are briefly presented. Future challenges in this field will also be discussed. Contents of Paper

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2

Gasiorowski, Andrzej, Piotr Szajerski e Jose Francisco Benavente Cuevas. "Use of Terbium Doped Phosphate Glasses for High Dose Radiation Dosimetry—Thermoluminescence Characteristics, Dose Response and Optimization of Readout Method". Applied Sciences 11, n. 16 (5 agosto 2021): 7221. http://dx.doi.org/10.3390/app11167221.

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The phosphate glass samples doped with Tb2O3 oxide (general formula: P2O5-Al2O3-Na2O-Tb2O3) were synthesized and studied for usage in high-dose radiation dosimetry (for example, in high-activity nuclear waste disposals). The influence of terbium concentration on thermoluminescent (TL) signals was analyzed. TL properties of glasses were investigated using various experimental techniques such as direct measurements of TL response vs. radiation dose, Tmax–Tstop and VHR (various heating rate) methods, and glow curve deconvolution analysis. The thermoluminescence dosimetry (TLD) technique was used as the main investigation tool to study detectors’ dose responses. It has been proved that increasing the concentration of terbium oxide in glass matrices significantly increases the thermoluminescence yield of examined material. For the highest dose range (up to 35 kGy), the dependence of the integrated thermoluminescent signals vs. dose can be considered as a saturation-type curve. Additional preheating of samples improves linearity of signal vs. dose dependencies and leads to a decrease of the signal loss over time. All obtained data suggest that investigated material can be used in high-dose radiation dosimetry. Additional advantages of the investigated dosimetric system are its potential ability to re-use the same dosimeters multiple times and the fact that reading dosimeters only requires usage of a basic TL reader without any modifications.

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Wang, Xiao Ning, Jing Ning, Xiao Wei Fan, Chen Zhang, Xiao Sheng Huang e Ying Huang. "Development of the Thermoluminescence Dosimetry Measure and Control System". Advanced Materials Research 663 (febbraio 2013): 1023–28. http://dx.doi.org/10.4028/www.scientific.net/amr.663.1023.

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Briefly introduces the detection principle, characteristic and method of thermoluminescence dosimetry, and designs a set of data acquisition and processing system for thermoluminescence dosimeter reader. The device’s peripheral hardware circuit design is simple and scalable. This system can be applied to a variety of thermoluminescence dosimetry testing equipment.

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4

Oliveira Junot, Danilo, Marcos A. P. Chagas e Divanízia Do Nascimento Souza. "ANÁLISE TERMOLUMINESCENTE DE COMPÓSITOS DE CaSO4 ATIVADO COM TERRAS RARAS". Eclética Química Journal 38, n. 1 (25 ottobre 2017): 90. http://dx.doi.org/10.26850/1678-4618eqj.v38.1.2013.p90-94.

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Since the thermoluminescence started to be applied to the dosimetry of ionizing radiation in 1940 different materials detectors have been proposed, and one of the most common is CaSO4. The motivation of this work was to produce crystals of CaSO4 doped with rare earth elements such as europium (Eu), neodymium (Nd) and thulium (Tm). It was also produced crystals of CaSO4:Ag. The interest in the production of these materials was to investigate other methods of production of thermoluminescent materials. The results show that the CaSO4:Tm is more suitable for use in the thermoluminescent dosimetry. Although not the most intense peak, the peak at 170 °C could be a dosimetric peak. Analyses showed that all samples have a TL response proportional to the dose absorbed.

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Omanwar, S. K., K. A. Koparkar e Hardev Singh Virk. "Recent Advances and Opportunities in TLD Materials: A Review". Defect and Diffusion Forum 347 (dicembre 2013): 75–110. http://dx.doi.org/10.4028/www.scientific.net/ddf.347.75.

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Thermoluminescence (TL) is the thermally stimulated emission of light from an insulator or a semiconductor following the previous absorption of energy from ionizing radiation. TL dosimetry is used in many scientific and applied fields such as radiation protection, radiotherapy, industry, and environmental and space research, using many different materials. The basic demands of a thermoluminescent dosimeter (TLD) are good reproducibility, low hygroscopicity, and high sensitivity for very low dose measurements and good response at high doses in radiotherapy and in mixed radiation fields. In this review, we have discussed the past developments and the future opportunities in TLD materials and our efforts to make better future use of low cost materials in TLD applications. For this we have studied and discussed two efficient TLD phosphors with low cost and simple method of preparation on large scale for TLD materials. One of the phosphors is LiF:Mg,Cu,P (LiF: MCP), and another one is LiCaAlF6:Eu, which has the potential to replace conventionally used CaSO4:Dy TL dosimeter. LiF: MCP and LiCaAlF6: Eu phosphors are potential candidates for TL dosimetry and could be good replacement for commercially available phosphors. Apart from this, we have also studied thermoluminescence in Aluminate and Borate materials. We have discussed in detail all three types of TLD materials. First, our study includes complete detail of material properties, methods and dosimetric characterizations of LiF: MCP Phosphor; second, it includes a new TL Dosimeter, LiCaAlF6: Eu and its dosimetric characterizations; and lastly on some TL properties of Li5AlO4: Mn and MgB4O7: Dy,Na. In this review, we discus some recent developments in radiation dosimetry with regards to the measurement techniques and material preparations. Although many materials have been and are currently being studied for TLD, still there is a scope for the improvement in the material properties useful for the TLD, and the synthesis of new, more suitable materials. Contents of Paper

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6

Murthy, K. V. R. "Thermoluminescence and its Applications: A Review". Defect and Diffusion Forum 347 (dicembre 2013): 35–73. http://dx.doi.org/10.4028/www.scientific.net/ddf.347.35.

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The present review article contains various applications of Thermoluminescence. The phenomena of thermoluminescence (TL) or thermally stimulated luminescence (TSL) and optically stimulated luminescence (OSL) are widely used for measurement of radiation doses from ionizing radiations, viz. x-rays, γ rays and β particles. The applications of TL are initiated in the field of Geology followed by Archaeology, personal dosimetry, material characterization and many more to name. The TL technique has been found to be useful in dating specimens of geologically recent origin where all other conventional methods fail. It has been found to be highly successful in dating ancient pottery samples. The TL/OSL dating is done from a quartz grain, which is collected from pottery or brick, by reading the TL-output. The main basis in the Thermoluminescence Dosimetry (TLD) is that TL output is directly proportional to the radiation dose received by the phosphor and hence provides the means of estimating the dose from unknown irradiations. The TL dosimeters are being used in personnel, environmental and medical dosimetry. During the last two decades, OSL based dosimeters have also been used for various applications. Natural and induced TL signals can be used to explore mineral, oil and natural gas. The present review presents TL theory, TL of minerals, salt, cement, salt crystals from pickles, and low temperature thermoluminescence (LLTL) of few agricultural products. Contents of Paper

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7

Amer, Hany, Mostafa Elashmawy, Huda Alazab e El-Din Ezz. "Suitability of pure nano crystalline LiF as a TLD dosimeter for high dose gamma radiation". Nuclear Technology and Radiation Protection 33, n. 1 (2018): 93–99. http://dx.doi.org/10.2298/ntrp1801093a.

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LiF is an alkali halide that is commonly used in radiation dosimetry utilizing its well-known thermoluminescence property. Pure LiF has very limited use in radiation dosimetry since the density and types of the internal traps are limited. For that reason, LiF is usually doped with different elements such as Mg and Ti in (TLD-100) to enhance its thermoluminescence properties and to be suitable for dosimetry applications. In this work we used ball milling as an alternative to dopants (impurities) to induce structure defects (e.g. dislocation) that will play the major role in thermoluminescence process similar to defectsecaused by dopants. The dislocation density of 1 h ball milled pristine LiF was evaluated at the MCX beamline of the Italian Synchrotron ELETTRA. A ball milled LiF was then compressed in the form of chips, then annealed for 1 h at 600?C to get rid of low temperature dislocations. The annealed samples showed linear response in the range 50-300 Gy. Fading investigation showed that the integral thermoluminescence intensity almost stabilizes after 12 days from the first irradiation. Results indicate that ball milling is a new promising technique to produce thermoluminescence dosimeters without using any kind of dopants.

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8

Hamilton, Ian. "OPERATIONAL THERMOLUMINESCENCE DOSIMETRY". Health Physics 78, n. 5 (maggio 2000): 569. http://dx.doi.org/10.1097/00004032-200005000-00020.

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9

Abraheem, Abeer Z., F. Khamis e Y. A. Abdulla. "TL Characteristics and Dosimetric Aspects of Mg-Doped ZnO". European Journal of Applied Physics 3, n. 1 (29 gennaio 2021): 43–47. http://dx.doi.org/10.24018/ejphysics.2021.3.1.37.

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Dosimetry characterization and the evaluation of kinetics parameters of trapping states of Mg-doped ZnO phosphors synthesized by Sol-Gel technique. The thermoluminescence response of Mg-doped ZnO samples showed a linear response when exposed to X-ray radiation and the optimum annealing condition was 400oC/4h for the three concentrations. A broad-shaped TL glow curve with an upper bound of 270 °C, which shifts to lower temperatures with increasing dose, indicating that general order (GO) kinetics thermoluminescence processes are involved. We conclude that the ZnO doped Mg phosphors under study are promises to develop dosimeters for high radiation dose measurements. Kinetic parameters, such as activation energy (E), frequency factor (s), and order of kinematic order (b), were estimated by the Glow Curve Deconvolution (GCD) method. ZnO:Mg phosphor has a great potential as a dosimeter for monitoring in the fields of ionizing radiation.

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10

Paprocki, K., J. Winiecki, R. Kabacińska, K. Przegietka, M. Szybowicz e K. Fabisiak. "Thermoluminescence properties of undoped diamond films deposited using HF CVD technique". Materials Science-Poland 35, n. 4 (21 marzo 2018): 785–90. http://dx.doi.org/10.1515/msp-2017-0103.

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Abstract Natural diamond has been considered as a perspective material for clinical radiation dosimetry due to its tissuebiocompatibility and chemical inertness. However, the use of natural diamond in radiation dosimetry has been halted by the high market price. The recent progress in the development of CVD techniques for diamond synthesis, offering the capability of growing high quality diamond layers, has renewed the interest in using this material in radiation dosimeters having small geometricalsizes. Polycrystalline CVD diamond films have been proposed as detectors and dosimeters of β and α radiation with prospective applications in high-energy photon dosimetry. In this work, we present a study on the TL properties of undoped diamond film samples grown by the hot filament CVD (HF CVD) method and exposed to β and α radiation. The glow curves for both types of radiation show similar character and can be decomposed into three components. The dominant TL peaks are centered at around 610 K and exhibit activation energy of the order of 0.90 eV.

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11

Julius (INVITED), H. W. "Instrumentation in Thermoluminescence Dosimetry". Radiation Protection Dosimetry 17, n. 1-4 (1 dicembre 1986): 267–73. http://dx.doi.org/10.1093/rpd/17.1-4.267.

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12

Bos, A. J. J. "High sensitivity thermoluminescence dosimetry". Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 184, n. 1-2 (settembre 2001): 3–28. http://dx.doi.org/10.1016/s0168-583x(01)00717-0.

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Julius (INVITED), H. W. "Instrumentation in Thermoluminescence Dosimetry". Radiation Protection Dosimetry 17, n. 1-4 (1 dicembre 1986): 267–73. http://dx.doi.org/10.1093/oxfordjournals.rpd.a079821.

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14

Rivera, T. "Thermoluminescence in medical dosimetry". Applied Radiation and Isotopes 71 (dicembre 2012): 30–34. http://dx.doi.org/10.1016/j.apradiso.2012.04.018.

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15

Burruel-Ibarra, S. E., C. Cruz-Vázquez, R. Bernal, J. R. Martínez-Castelo, A. R. García Haro e V. R. Orante-Barrón. "Synthesis and Thermoluminescent Properties of New ZnO Phosphors". Materials Science Forum 755 (aprile 2013): 139–44. http://dx.doi.org/10.4028/www.scientific.net/msf.755.139.

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In this work, results on the thermoluminescence dosimetry properties of beta particle irradiated ZnO obtained by thermal annealing of chemically synthesized ZnS are reported. ZnS powder was sintered at 950 °C during 24 h in air, in order to obtain pellet-shaped ZnO samples. The thermoluminiescence (TL) intensity of ZnO previously exposed to beta radiation increased as the dose increased in the 0.025-6.4 kGy interval studied. Characteristic glow curves exhibited two emission maxima at ~ 94 and ~ 341 °C. The dosimetric peak located at ~ 341 °C shifted towards lower temperatures as the dose increased, which indicates that second-order kinetic processes are involved in the thermoluminiescence emission. The dose response of ZnO showed a linear behaviour in the 0.025 Gy-0.8 kGy dose interval, which makes this material suitable and promising for medical, industrial and also space dosimetry applications. The thermoluminescence total signal faded down 48 % 6 h after irradiation and showed an asymptotic behaviour for longer times, due mainly to the ~ 341 °C stable and dosimetric glow peak.

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16

García-Haro, A. R., R. Bernal, C. Cruz-Vázquez, S. E. Burruel-Ibarra, V. R. Orante-Barrón e F. Brown. "Study of the Thermoluminescent Characteristics of Ceramic Roof Tiles Exposed to Beta Radiation". MRS Proceedings 1481 (2012): 89–95. http://dx.doi.org/10.1557/opl.2012.1636.

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ABSTRACTIn this work, thermoluminescence (TL) characteristics of roof tile ceramic samples previously exposed to beta radiation are reported for the very first time. TL measurements were carried out using powdered samples obtained by the the fine-grained method, with grain size ranged from 300 nm to 5 μm. Characteristic thermoluminescence glow curves showed a complex structure with a dosimetric maximum located at ~ 200 °C. TL response of roof tile samples increases as the radiation dose increases in the 25 Gy to 1.6 kGy range. One response showed a linear behaviour, with no evidence of saturation within the dose interval investigated. The entire TL glow curve exhibited a remarkable reusability during 10 consecutive irradiation-TL readout cycles. The total TL signal showed a very low fading and remained almost constant after 3 h of irradiation and the corresponding TL readout. TL dosimetry features of powdered roof tile place it as a promising material in retrospective dosimetry as well as in possible TL dating applications.

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17

Cipa, J., L. Trinkler e B. Berzina. "Thermoluminescence Response of AlN+Y2O3 Ceramics to Sunlight and X-Ray Irradiation". Latvian Journal of Physics and Technical Sciences 58, n. 1 (29 gennaio 2021): 3–14. http://dx.doi.org/10.2478/lpts-2021-0001.

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Abstract AlN is a wide band gap material with promising properties for dosimetric applications, especially in UV dosimetry. In the present research, the thermoluminescence method is used in order to better understand sunlight and X-ray irradiation effects on yttria doped AlN ceramics. In general, the TL response is characterised by a broad TL peak with maxima around 400–450 K and a TL emission spectrum with UV (400 nm), Blue (480 nm) and Red (600 nm) bands. Compared to the X-ray irradiation, sunlight irradiation creates a wider TL glow curve peak with a maximum shifted to higher temperatures by 50 K. Furthermore, in the TL emission spectra of AlN irradiated with sunlight the UV band is suppressed. The reasons of the TL peculiarities under two types of irradiation are discussed. Practical application of AlN ceramics as material for UV light TL dosimetry and, in particular, for sunlight dosimetry is estimated.

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Abdel-Razek, Yassin A. "Thermoluminescence dosimetry using natural calcite". Journal of Taibah University for Science 10, n. 2 (aprile 2016): 286–95. http://dx.doi.org/10.1016/j.jtusci.2015.08.002.

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McKeever, S. W. S. "Editorial - Thermoluminescence Dosimetry: Deterministic Unpredictability". Radiation Protection Dosimetry 49, n. 4 (1 ottobre 1993): 405–6. http://dx.doi.org/10.1093/oxfordjournals.rpd.a081979.

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Chandra, B. P., V. K. Chandra e Piyush Jha. "Elastico-Mechanoluminescence of Thermoluminescent Crystals". Defect and Diffusion Forum 347 (dicembre 2013): 139–77. http://dx.doi.org/10.4028/www.scientific.net/ddf.347.139.

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Elastico-mechanoluminescence (EML) is a type of luminescence induced by elastic deformation of solids. The present paper reports the elastic-ML of thermoluminescent crystals such as X-or γ-irradiated alkali halide crystals, ZnS:Mn, and ultraviolet irradiated persistent luminescent crystals. Generally, all the elastico-mechanoluminescent crystals are thermoluminescent, but all the thermoluminescent crystals are not the mechanoluminescent. The elastico-mechanoluminescence spectra of crystals are similar to their thermoluminescence spectra. Both the elastico-mechanoluminescence and thermoluminescence arise due to the de-trapping of charge carriers. As elastico-ML of persistent luminescent crystals depends on both the density of filled traps and piezoelectric field, the intense thermoluminescent crystals may not be the intense mechanoluminescent crystals. When a sample of X-or γ-irradiated alkali halide crystal, UV-irradiated persistent luminescent microcrystals mixed in epoxy resin, or a film of ZnS:Mn nanoparticles is deformed in the elastic region by the pressure rising at fixed pressing rate for a particular time, or by a pressure of triangular form, or by a pressure pulse, then after a threshold pressure, initially the EML intensity increases with time, attains a maximum value and later on it decreases with time. In the first case, the fast decay time of EML is related to the time-constant for stopping the moving crosshead of the testing machine; in the second case, generally the fast decay does not appear; and in the third case, the fast decay time is equal to the rise time of the pressure pulse. However, in all the cases, the slow decay time is related to the lifetime of re-trapped charge carriers in the shallow traps lying in the region where the piezoelectric field is negligible. When the sample is deformed by the pressure rising at fixed pressing rate for a particular time, or pressure of triangular form, then the ML appears after a threshold pressure and the transient EML intensity increases linearly with the applied pressure; however, the total EML intensity increases quadratically with the applied pressure. The EML intensity of persistent luminescent crystals decreases with increasing number of pressings. However, when these crystals are exposed to UV light, then the recovery of EML intensity takes place. The mechanical interaction between the bending segment of dislocations and filled electron traps is able to explain the elastico-ML of X-or γ-irradiated alkali halide crystals. However, the piezoelectrically-induced de-trapping model is suitable for explaining the ML of persistent luminescent crystals and ZnS:Mn. The investigation of elastico-ML may be helpful in understanding the thermoluminescence and the investigation of thermoluminescence may be helpful in understanding elastico-ML. Furthermore, similar to the thermoluminescence, the mechanoluminescence may also find application in radiation dosimetry. Expressions are derived for the elastico-ML of thermoluminescent crystals, in which a good agreement is found between the experimental and theoretical results. Finally, the application of the elasticoML of thermoluminescent crystals in light sources, displays, imaging devices, sensing devices, radiation dosimetry and in non-destructive testing of materials are discussed.Contents of Paper

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Orante-Barrón, V. R., F. M. Escobar-Ochoa, C. Cruz-Vázquez e R. Bernal. "Thermoluminescence of Novel Zinc Oxide Nanophosphors Obtained by Glycine-Based Solution Combustion Synthesis". Journal of Nanomaterials 2015 (2015): 1–5. http://dx.doi.org/10.1155/2015/273571.

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High-dose thermoluminescence dosimetry properties of novel zinc oxide nanophosphors synthesized by a solution combustion method in a glycine-nitrate process are presented for the very first time in this work. Sintered particles with sizes ranging between ~500 nm and ~2 μm were obtained by annealing the synthesized ZnO at 900°C during 2 h in air. X-ray diffraction patterns indicate the presence of the ZnO hexagonal phase, without any remaining nitrate peaks observed. Thermoluminescence glow curves of ZnO obtained after being exposed to beta radiation consists of two maxima: one located at ~149°C and another at ~308°C, the latter being the dosimetric component of the curve. The integrated TL fading displays an asymptotic behavior for times longer than 16 h between irradiation and the corresponding TL readout, as well as a linear behaviour of the dose response without saturation in the studied dose interval (from 12.5 up to 400 Gy). Such features place synthesized ZnO as a promising material for high-dose radiation dosimetry applications.

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Freire de Souza, Luiza, e Divanízia N. Souza. "PRODUÇÃO DE DOSÍMETROS TERMOLUMINESCENTES À BASE DE MgB4O7: Dy e MgB4O7:Tm". Eclética Química Journal 38, n. 1 (25 ottobre 2017): 101. http://dx.doi.org/10.26850/1678-4618eqj.v38.1.2013.p101-108.

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The thermoluminescent dosimetry (TL) is a well-established technique for the detection of ionizing radiation in hospitals, clinics, and industrial establishments where there is the need to quantify the radiation. For this practice is require the use phosphors which are sensitive to radiation. Some phosphors are already commonly used in this practice, for example, TLD-100 (LiF: Mg, Ti), CaSO4:Tm and CaSO4:Dy. A compound that was most recently introduced in dosimetry and has many advantageous features to detect neutrons, electrons and gamma is the magnesium tetraborate (MgB4O7), but the undoped material is not good for dosimetry, since signal does not show satisfactory thermoluminescence. The present work presents the analysis of the compound MgB4O7 when doped with rare earth elements, thulium (Tm) and dysprosium (Dy). The production of MgB4O7: Dy and MgB4O7: Tm occurred under acidic conditions. Following the process of crystal growth, several tests were made on phosphors produced to verify the quality of materials as TL dosimeter. Initially, was made the identification of the crystalline phases found in the material, using the technique of X-ray diffractometry, and then were evaluated and compared the TL emission curves of the crystals with two different types of dopants, to this, the samples were irradiated with different radiation sources: 137Cs (0,66 MeV), 60Co (1.25 MeV) and X-rays (0.41 MeV) and based on the results was evaluated the energy dependence of phosphors. Another characteristic analyzed, was the decay of TL signal for the material (fading). The results show that the material can be an excellent TL dosimeter when doped with rare earth elements Dy and Tm.

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Journal, Baghdad Science. "Using LiF Disc in Thermoluminescence Dosimetry". Baghdad Science Journal 5, n. 1 (2 marzo 2008): 51–54. http://dx.doi.org/10.21123/bsj.5.1.51-54.

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A LiF (TLD-700) PTFED disc has adiameter of (13mm) and thickness of (0.4mm) for study the response and sensetivity of this material for gamma and beta rays by using (TOLEDO) system from pitman company. In order to calibrate the system and studying the calibration factor. Discs were irradiated for Gamma and Beta rays and comparing with the theoretical doses. The exposure range is between 15×10-2 mGy to 1000×10-2 mGy. These doses are within the range of normal radiation field for workers.

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Cameron, John. "Thermoluminescence dosimetry materials: Properties and uses". Applied Radiation and Isotopes 49, n. 4 (aprile 1998): 405–6. http://dx.doi.org/10.1016/s0969-8043(96)00317-x.

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Olko, P. "Thermoluminescence dosimetry materials: Properties and uses". Radiation Physics and Chemistry 50, n. 3 (settembre 1997): 313–14. http://dx.doi.org/10.1016/s0969-806x(95)00177-y.

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Gilvin, P. J., S. T. Baker, D. C. Rose e N. J. Garratt. "The UK HPA thermoluminescence dosimetry system". Radiation Measurements 43, n. 2-6 (febbraio 2008): 611–15. http://dx.doi.org/10.1016/j.radmeas.2007.12.048.

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Moscovitch (INVITED), M. "Dose Algorithms for Personal Thermoluminescence Dosimetry". Radiation Protection Dosimetry 47, n. 1-4 (1 maggio 1993): 373–80. http://dx.doi.org/10.1093/rpd/47.1-4.373.

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Furetta, C., V. Mendozzi, C. Sanipoli, A. Scacco, C. Leroy, F. Marullo e P. Roy. "Thermoluminescence of LiF:Cu2+in radiation dosimetry". Journal of Physics D: Applied Physics 28, n. 7 (14 luglio 1995): 1488–94. http://dx.doi.org/10.1088/0022-3727/28/7/030.

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Gfirtner, H. "A management system for thermoluminescence dosimetry". IFAC Proceedings Volumes 36, n. 15 (agosto 2003): 517–20. http://dx.doi.org/10.1016/s1474-6670(17)33557-7.

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Somaiah, K., e B. Sathyanarayana. "A New Phospnor for Thermoluminescence Dosimetry". Crystal Research and Technology 26, n. 2 (1991): K34—K38. http://dx.doi.org/10.1002/crat.2170260223.

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Moscovitch (INVITED), M. "Dose Algorithms for Personal Thermoluminescence Dosimetry". Radiation Protection Dosimetry 47, n. 1-4 (1 maggio 1993): 373–80. http://dx.doi.org/10.1093/oxfordjournals.rpd.a081770.

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Ranogajec-Komor, M^ ^aacute;ria. "Thermoluminescence Dosimetry-Application in Environmental Monitoring". Radiation Safety Management 2, n. 1 (2003): 2–16. http://dx.doi.org/10.12950/rsm2002.2.2.

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Kron, T. "Applications of Thermoluminescence Dosimetry in Medicine". Radiation Protection Dosimetry 85, n. 1 (1 settembre 1999): 333–40. http://dx.doi.org/10.1093/oxfordjournals.rpd.a032865.

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34

Sweet, M. A. S., e J. Rennie. "Thermoluminescence dosimetry using doped calcium sulphide". Journal of Crystal Growth 86, n. 1-4 (gennaio 1988): 942–47. http://dx.doi.org/10.1016/0022-0248(90)90829-a.

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35

Einbergs, Ernests, Aleksejs Zolotarjovs, Ivita Bite, Katrina Laganovska, Krisjanis Auzins, Krisjanis Smits e Laima Trinkler. "Usability of Cr-Doped Alumina in Dosimetry". Ceramics 2, n. 3 (2 settembre 2019): 525–35. http://dx.doi.org/10.3390/ceramics2030040.

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Abstract (sommario):

Dosimetry is a widespread material science field dealing with detection and quantification of ionizing radiation using electronic processes in materials. One of the main aspects that determines the performance of dosimeters is the type of defects the material contains. Crystalline lattice imperfections are formed around impurity ions, which may have a smaller or larger size, or different oxidation states compared to host ions. In this study, we show what effects Cr impurities have on the luminescent properties of alumina. Porous Al 2 O 3 : Cr microceramics synthesized using the sol-gel method showed a higher thermoluminescence response than a single crystal ruby. We have found that Cr 2 O 3 concentration of 0.2 wt% was optimal; it yielded the highest X-ray luminescence and thermostimulated luminescence readout of all studied additive concentrations added to alumina during synthesis. Our results show that Cr doped alumina could potentially be used as a promising new material for dosimetry of ionizing radiation.

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36

Chandler, J. R., S. Sholom, S. W. S. McKeever e H. L. Hall. "Thermoluminescence and phototransferred thermoluminescence dosimetry on mobile phone protective touchscreen glass". Journal of Applied Physics 126, n. 7 (21 agosto 2019): 074901. http://dx.doi.org/10.1063/1.5108971.

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37

Rivera Montalvo, T., C. Furetta, J. Azorín Nieto, C. Falcony Guajardo, M. García e Eduardo Martínez. "Termoluminescent Properties of High Sensitive ZrO₂+PTFE for UV Radiation Dosimetry". Materials Science Forum 480-481 (marzo 2005): 373–80. http://dx.doi.org/10.4028/www.scientific.net/msf.480-481.373.

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This paper presents the preparation method, luminescent characteristics and the results of studying the thermoluminescence (TL) properties of zirconium oxide (ZrO2) exposed to 260 nm ultraviolet radiation. The glow curve of ZrO2+PTFE pellets exhibited one peak centered at 180°C about 30°C lower than that the commercially available aluminum oxide peak (Al2O3:C). TL response as a function of spectral irradiance showed good linear in the range from 2.4 to 3000 µJ/cm2 of spectral irradiance. Experimental results of studying the thermoluminescent (TL) properties of ZrO2+PTFE exposed to ultraviolet radiation allow to propose zirconium oxide as an excellent candidate as ultraviolet radiation dosimeter.

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38

Matsumoto, Tetsuo. "Thermal neutron response of thermoluminescence dosimeters for application to biomedical dosimetry". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 301, n. 3 (marzo 1991): 552–57. http://dx.doi.org/10.1016/0168-9002(91)90022-i.

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39

Rahman, M. Obaidur, Md Ashraful Hoque, Md Shakilur Rahman e Afia Begum. "Responses of LiF Thermoluminescence Dosimeters to Diagnostic 60Co Teletherapy Beams". Bangladesh Journal of Medical Physics 8, n. 1 (10 settembre 2017): 14–21. http://dx.doi.org/10.3329/bjmp.v8i1.33930.

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Abstract (sommario):

Thermoluminescence Dosimeter (TLD) is used as an ionizing radiation detector in the field of clinical radiotherapy, diagnostic radiology, personal radiation monitoring as well as in environmental radiation dosimetry. The sensitivity of all the TLDs is not the same even though the manufacturer produced them in the same batch. The response of TLD at various doses is also not always linear. In the present study fifty-seven rod shaped LiF TLDs had been irradiated by doses of 50cGy, 100cGy, 150cGy and 200cGy using 60Co teletherapy unit of Dhaka Medical College (Alcyon II, CGR, McV, France). The TLDs were placed in the grooves of a slab phantom and then covered by a 0.5cm thick plexiglass sheet. The phantom was then irradiated in the reference condition (10x10cm2 field size, 80cm SSD). After irradiation, readout of TLDs was done using a Harshaw TLD reader (Model 3500). Measurements were performed three times for each dose value and their average was taken. For convenience all fifty-seven TLDs were divided into nineteen groups. Grouping was done according to the response of the TLDs for a fixed dose value. In a particular group of TLDs, variation of the response of the dosimeters is the smallest one. The dose (cGy) response (nC) linearity curve of TLDs for each of the nineteen groups showed to be very close to unity.Bangladesh Journal of Medical Physics Vol.8 No.1 2015 14-21

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40

Journal, Baghdad Science. "Thermoluminescence dosimetry of mixed neutron – gamma fields". Baghdad Science Journal 9, n. 3 (11 dicembre 2018): 446–49. http://dx.doi.org/10.21123/bsj.9.3.446-449.

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Abstract (sommario):

The method of measurement dosimetry in neutron – gamma field by using CaSo4 : Dy (PTFE) disc which has a diameter of 1.3mm and thickness of 0.2mm and using hydrogenated material as a converters of neutron to recoil protons (n-p) reaction, the discs were irradiated by neutron source (241Am-Be) with flux of 4.5?105 n/cm2s for different time to obtain different dose. The TL signals, which we have been obtained by using the converters, are increases to 71%. So we can resolve the neutron and gamma in mixed field.

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41

Braunlich, P. F., e W. Tetzlaff. "An Automated Laser Heated Thermoluminescence Dosimetry System". Radiation Protection Dosimetry 17, n. 1-4 (1 dicembre 1986): 321–24. http://dx.doi.org/10.1093/rpd/17.1-4.321.

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42

Shaver, I. Kh, e V. G. Krongauz. "Compositional Principle in Fast Neutron Thermoluminescence Dosimetry". Radiation Protection Dosimetry 33, n. 1-4 (1 ottobre 1990): 67–70. http://dx.doi.org/10.1093/rpd/33.1-4.67.

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43

Puppalwar, S. P., S. J. Dhoble e Animesh Kumar. "Cu+emission in Li2BPO5material for thermoluminescence dosimetry". Radiation Effects and Defects in Solids 167, n. 5 (maggio 2012): 333–41. http://dx.doi.org/10.1080/10420150.2011.653663.

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44

Braunlich, P. F., e W. Tetzlaff. "An Automated Laser Heated Thermoluminescence Dosimetry System". Radiation Protection Dosimetry 17, n. 1-4 (1 dicembre 1986): 321–24. http://dx.doi.org/10.1093/oxfordjournals.rpd.a079832.

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45

Shaver, I. Kh, e V. G. Krongauz. "Compositional Principle in Fast Neutron Thermoluminescence Dosimetry". Radiation Protection Dosimetry 33, n. 1-4 (1 ottobre 1990): 67–70. http://dx.doi.org/10.1093/oxfordjournals.rpd.a080760.

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46

Hirning, C. Ross. "Detection and Determination Limits For Thermoluminescence Dosimetry". Health Physics 62, n. 3 (marzo 1992): 223–27. http://dx.doi.org/10.1097/00004032-199203000-00002.

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47

A. Sono, D., e S. W. S. McKeever. "Phototransferred Thermoluminescence for Use in UVB Dosimetry". Radiation Protection Dosimetry 100, n. 1 (1 luglio 2002): 309–12. http://dx.doi.org/10.1093/oxfordjournals.rpd.a005875.

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48

Ginzburg, D., L. Oster, I. Eliyahu, G. Reshes, S. Biderman e Y. S. Horowitz. "MANIPULATION OF THE DOSE–RESPONSE OF COMPOSITE GLOW PEAK 5 IN THE THERMOLUMINESCENCE OF LiF:Mg,Ti (TLD-100) VIA OPTICAL EXCITATION POST-IRRADIATION: POTENTIAL FOR IMPROVED DOSE–RESPONSE LINEARITY BEYOND 1 Gy". Radiation Protection Dosimetry 184, n. 2 (1 dicembre 2018): 248–55. http://dx.doi.org/10.1093/rpd/ncy206.

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Abstract (sommario):

Abstract Many dosimetric applications and especially those involved in clinical dosimetry are hampered by the supralinearity of TLD-100 which begins at a level of dose of 1 Gy. This research investigates the effect of optical excitation following irradiation on the dose–response. It is expected that this will lead to a more linear dose–response, however, irrespective of the hoped-for linearity, the theoretical/kinetic simulations of the effect of optical excitation will further enhance our understanding of the thermoluminescence mechanisms, especially the role of spatially correlated trapping and luminescent centers. In the following, the various stages carried out in these investigations are discussed and preliminary results presented.

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49

Mat Nawi, Siti Nurasiah, Norfadira Wahib, Nurul Najua Zulkepely, Yusoff Mohd Amin, Ung Ngie Min, David Andrew Bradley, Siti Fairus Abdul Sani e Mohd Jamil Maah. "Thermoluminescence Characteristics of Cylindrical Optical Fibers with Different Diameters in Radiation Dosimetry Subjected to Electron Irradiation". Advanced Materials Research 1133 (gennaio 2016): 409–13. http://dx.doi.org/10.4028/www.scientific.net/amr.1133.409.

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Abstract (sommario):

Thermoluminescence (TL) characteristics for various cross-sections of 6 mole% of tailor-made Ge-doped cylindrical optical fibers were determined. The general TL characteristic i.e., dose rate dependence, energy dependence, dose response and reproducibility of the samples have been investigated. The samples were irradiated using electron beam (Linac) and been exposed to dose ranging from 1 to 4 Gy. The cylindrical optical fibers provide highly linear dose response within the clinical relevant dose range, independence of radiation energy over the range of energies investigated, independence of dose rate and excellent reproducibility. This research shows that germanium doped silica fibers have high potential of dosimetric properties and suitable as TL-mode detectors in instances of radiotherapy (clinical dosimetry).

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50

Patel, Nimesh P., Vishwnath Verma, Dhaval Modi, K. V. R. Murhty e M. Srinivas. "Thermoluminescence kinetic features of Eu3+ doped strontium pyrophosphate after beta irradiation". RSC Advances 6, n. 81 (2016): 77622–28. http://dx.doi.org/10.1039/c6ra15672j.

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Abstract (sommario):

Strontium pyrophosphate (Sr₂P₂O₇) doped with various concentrations of Eu³⁺ as a doping agent is synthesized using a combustion method and to study the thermoluminescence dosimetry [TLD] and applications.

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