Journal articles: 'TLD dosimeter'

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Barros, Silvia, and Geehyun Kim. "Response assessment of a new albedo neutron dosimeter." International Journal of Modern Physics: Conference Series 48 (January 2018): 1860111. http://dx.doi.org/10.1142/s2010194518601114.

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The use of thermoluminescent dosimeters (TLDs) by personnel who work in radiation-rich environments is required by law. However, many professionals prefer to use Electronic Personal Dosimeters (EPDs), which provide dose estimation in real time. This preference may lead to a generalized use of the EPD instead of using the required TLD, as the use of both types at once can be uncomfortable and impractical. In an effort to avoid this scenario, a gamma/neutron dosimeter composed of a TLD and an EPD is being developed. In this paper, the results obtained from the studies performed in order to develop the neutron albedo dosimeter to be incorporated in the TLD[Formula: see text]EPD dosimeter are presented. Monte Carlo simulations using the state-of-the-art Monte Carlo N-Particle Transport (MCNPX) code were used to calculate the response of the albedo dosimeter. The thermal neutron detectors under consideration for use in the proposed dosimeter are the EJ-426 and the EJ-420. Both detectors employ a lithium compoundenriched to 95% [Formula: see text]Li dispersed in a ZnS:(Ag) matrix. The tomographic phantom Korean Typical Man-2 was used in the simulations to calculate the fraction of radiation backscattered by a human body in different radiation field conditions. From these results, it was concluded that both dosimeters are fit to be used as albedo dosimeters.

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Omanwar, S. K., K. A. Koparkar, and Hardev Singh Virk. "Recent Advances and Opportunities in TLD Materials: A Review." Defect and Diffusion Forum 347 (December 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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Manzoli, José Eduardo, Vicente de Paulo de Campos, and Mirian Saori Doi. "Evaluation of reproductibility and detection limit of CaSO4: dy radiation detectors." Brazilian Archives of Biology and Technology 49, spe (January 2006): 53–58. http://dx.doi.org/10.1590/s1516-89132006000200009.

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Measurement response of thermoluminescent dosimeter, TLD, used by workers or placed at positions where gamma radiation field could be in action affecting biological tissues, should be completely characterized, in order to achieve the radiation quantity with precision and confidence. Among the evaluations concerned to its characterization, the detector reproductibility is of fundamental importance, because detectors present inside the TLD will be used many times in routine. Reproductibility is studied by repeated exposure to the same radiation field. The minimum detection limit is another important characteristics of a TLD. In this work evaluations of reproductibility and minimum detection are presented, for dosimeters produced at IPEN.

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Hernawan, Safarudin, Eka Djatnika Nugraha, Sutanto Sutanto, and Eri Hiswara. "PEMBUATAN THERMOLUMINESENSE DOSIMETER DARI BAHAN LITIUM FLUORIDA DAN PENGOTOR TITANIUM." Jurnal Forum Nuklir 10, no. 1 (June 7, 2017): 38. http://dx.doi.org/10.17146/jfn.2016.10.1.3492.

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PEMBUATAN THERMOLUMINESENSE DOSIMETER DARI BAHAN LITIUM FLUORIDA DAN PENGOTOR TITANIUM. Teknologi nuklir bermanfaat dalam berbagai bidang, misalnya bidang energi, pertanian, kedokteran, radiologi, lingkungan dan lain-lain, disamping itu paparan radiasi dari teknologi nuklir berdampak buruk bagi sel-sel tubuh manusia. perlu ada pengawasan terhadap pemanfaatan radiasi teknologi nuklir dengan menggunakan alat proteksi radiasi berupa dosimeter personal yaitu thermoluminesense dosimeter (TLD) yang saat ini pengunaannya di Indonesia masih di impor. TLD dapat dibuat dari bahan litium fluorida dengan variasi konsentrasi pengotor titanium 0,04%, 0,06%, dan 0,08% melalui metode kristalisasi dengan pemanasan pada suhu 950 celcius selama lima jam. kristal yang terbentuk dibuat serbuk dan diuji respon, keseragaman, kalibrasi, pemudaran dan pengulangan. hasil pembuatan menunjukkan TLD yang dibuat memiliki respon terhadap radiasi yang optimum pada konsentrasi pengotor titanium 0,06%. TLD yang dibuat memiliki faktor kalibrasi sebesar 0,0936 dan dapat diulang pemakaian sebanyak 5 kali. Pemudaran TLD yang dibuat sebesar 20% selama 14 hari.

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Sohan, N. A., M. J. Dewan, A. K. M. M. Rahman, M. Al-Mamun, and M. I. Hosan. "Thermo-luminescence Response of Carbon Nanotubes and Some Other Familiar TL Materials Using Medical LINAC." Journal of Scientific Research 12, no. 4 (September 1, 2020): 455–62. http://dx.doi.org/10.3329/jsr.v12i4.45336.

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Strain and impurity defects in carbon nanotubes (CNTs) particularly their potentiality as a new TL material has been studied over the years. In this research, our main objective is to explore the suitability of using CNTs and its composites in the area of TL dosimeter. For this purpose, a study was carried out between the TL responses of the dosimeters TLD-100, TLD-7000 and NaI-LiF pellets. To carry out this research, equivalent irradiations were performed with these pellets using clinical linear accelerator (LINAC) under 6 MV X-ray photon beam. The dose range was from 0.5 to 5 Gy. During irradiation, the dose rate was kept constant at 300 MU/min. TLD reader was used to readout the samples in a flowing N2 atmosphere to reduce surface oxidation.During readout, pre-heat temperature was set initially at 50 °C, acquired temperature rate 10 °C/s and maximum annealed temperature was 300 °C. Response of TLD-100 under varying dose was typically linear for any doses but other dosimeters TLD-7000 showed supra-linearity beyond 2 Gy and NaI-LiF pellets showed sub-linearity response after 2 Gy. The TL glow peak of CNTs indicated that it was lying somewhere away from 300 °C.

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Nazaroh, Nazaroh. "KAJIAN ANALISIS KETIDAKPASTIAN TLD POSTAL IAEA/WHO SEBAGAI STANDAR PROGRAM AUDIT DOSIS." Jurnal Standardisasi 11, no. 2 (July 28, 2009): 73. http://dx.doi.org/10.31153/js.v11i2.634.

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The International Atomic Energy Agency (IAEA) and World Health Organization (WHO) operate the IAEA/WHO TLD postal dose audit programme using thermoluminescence dosimeter (TLDs) for Secondary Standard Dosimetry Laboratory (SSDL) and user every year. As National Reference Laboratory in the field of radiation metrology, PTKMR – BATAN always participates in the postal dose audit programme on therapy level for 60Co beam. On the postal dose audit programme, the uncertainties in the dose determination from TLD measurements have been evaluated by IAEA, which is comprises of uncertainties in the calibration coefficient of the TLD system and uncertainties in factors correcting for dose response non linearity, fading of TL signal, energy response, and influence of TLD holder. The individual uncertainties then have been combined to estimate the total uncertaintiy in the dose evaluated from TLD measurements. The combined relative standard uncertainty in the dose determined from TLD measurements has been estimated to be 1.2% for irradiation with 60Co gamma rays and 1.6% for irradiation with high-energy X-rays. Results from irradiations by Bureau Internationale des Poids et Mesures (BIPM), Primary Standard Dosimetry Laboratory (PSDL), and SSDL compare favourably with the estimated uncertainties, whereas TLD results of radiotherapy centres show higher standard deviations than those derived theoretically. This paper presented the result of TLD postal dose audit for 60Co beam owned by PTKMR-BATAN in the year of 2006-2008.

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Rahman, M. Obaidur, Md Ashraful Hoque, Md Shakilur Rahman, and Afia Begum. "Responses of LiF Thermoluminescence Dosimeters to Diagnostic 60Co Teletherapy Beams." Bangladesh Journal of Medical Physics 8, no. 1 (September 10, 2017): 14–21. http://dx.doi.org/10.3329/bjmp.v8i1.33930.

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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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Radaideh, Khaldoon M., Laila M. Matalqah, A. A. Tajuddin, W. I. Fabian Lee, S. Bauk, and E. M. Eid Abdel Munem. "Development and evaluation of a Perspex anthropomorphic head and neck phantom for three dimensional conformal radiation therapy (3D-CRT)." Journal of Radiotherapy in Practice 12, no. 3 (April 22, 2013): 272–80. http://dx.doi.org/10.1017/s1460396912000453.

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AbstractPurposesTo design, construct and evaluate an anthropomorphic head and neck phantom for the dosimetric evaluation of 3D-conformal radiotherapy (3D-CRT) dose planning and delivery, for protocols developed by the Radiation Therapy Oncology Group (RTOG).Materials and methodsAn anthropomorphic head and neck phantom was designed and fabricated using Perspex material with delineated planning target volumes (PTVs) and organs at risk (OARs) regions. The phantom was imaged, planned and irradiated conformally by a 3D-CRT plan. Dosimetry within the phantom was assessed using thermoluminescent dosimeters (TLDs). The reproducibility of phantoms and TLD readings were checked by three repeated identical irradiations. Subsequent three clinical 3D-CRT plans for nasopharyngeal patients have been verified using the phantom. Measured doses from each dosimeter were compared with those acquired from the treatment planning system (TPS).ResultsPhantom's measured doses were reproducible with <3·5% standard deviation between the three TLDs’ repeated measurements. Verification of three head and neck 3D-CRT patients’ plans was implemented, and good agreement between measured values and those predicted by TPS was found. The percentage dose difference for TLD readings matched those corresponding to the calculated dose to within 4%.ConclusionThe good agreement between predicted and measured dose shows that the phantom is a useful and efficient tool for 3D-CRT technique dosimetric verification.

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Kartubi, Nazaroh, Assef Firnando Firmansyah, Pardi Pardi, and Caecilia Tuti Budiantari. "Preparation for Eye Lens Dose Assessment at CSTRM-NNEA." SciMedicine Journal 2, no. 1 (March 1, 2020): 30–37. http://dx.doi.org/10.28991/scimedj-2020-0201-5.

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Because of the negative impact of radiation on the eye lens and the changes recommended by the International Commission on Radiological Protection (ICRP) 103 (2007) from 150 to 20 mSv (2 rem, the Regulation of BAPETEN Head No. 4 (2013) article 56 give the instruction that Monitoring of eye lens dose should be implemented starting from March 13, 2016, more intensive around the eye lens. To prepare eye lens dose assessment, The Center for Safety Technology and Radiation Metrology (CSTRM) - NNEA study the response of TLD-700H against the X-ray: N (80), N (100) and N (120) energies (usually used in the interventional radiology). Goals and objectives of this study were to obtain the response/calibrated TLD-700H which is traceable to the international system (SI) and TLD-700H can be used for an eye lens dose assessment in Indonesia. Twenty-one TLDs were irradiated with seven dosage variations (0.1; 0.5; 1; 5; 10; 15; 20) mSv at the Secondary Standard Dosimetry Laboratory (SSDL) - Jakarta. After being stored for 24 hours, the TLD were read by using TLD-Reader. The Dosimeter Response, R against doses of X-ray were: R(N80) = 34.595x + 0.1262; R² = 0.9986; R(N100) = 24.484x + 1.1357; R² = 0.9993; and R(N120) = 27.908x - 5.1065; R² = 0.9971. R: correlation coefficient, x: doses; These calibration responses can be used for eye lens dose assessment in Indonesia.

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Grosser, Oliver Stephan, Heiko Wissel, Maurice Klopfleisch, Dennis Kupitz, Nadine Paetzold, Maciej Pech, and Michael C. Kreissl. "Time course and local distribution of skin exposure of hand and fingers from [68Ga]Ga-DOTA-NOC synthesis using a self-shielded module." Nuklearmedizin 59, no. 04 (March 25, 2020): 308–15. http://dx.doi.org/10.1055/a-1134-4374.

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Abstract Aim The study examined the local dose distribution as well as the time course of skin exposure of hand and fingers from [68Ga]Ga-DOTA-NOC synthesis using a self-shielded synthesis module. Methods A compact calibrated electronic dosimeter (ED) with a miniaturized probe was used for real-time measurements of skin dose equivalent Hp (0.07) (reference point: left and right index finger). A time resolved assessment of exposure during radiotracer production was performed. Additionally, thermoluminescence dosimeters (TLD) were used to determine local dose distribution for five different positions (e. g. fingertips). Cumulated Hp (0.07) estimated by ED was analysed and correlated with the measurements obtained by a TLD positioned close to the ED. Results The cumulative skin exposure from the production process measured by ED, was 74.7 ± 32.7 µSv/GBq and 40.1 ± 14.3 µSv/GBq for the right and left hand, respectively. The exposure recorded by the ED was in the average 19.4 % ± 40.0 % (median = 21.3 %) lower compared to the results from TLD. Highest exposure was recorded during synthesis (guided hand: 24.5 ± 12.2 µSv/GBq) and measuring of product yield including preparation of probes for quality control (guided hand: 36.1 ± 12.7 µSv/GBq). The highest local exposure was measured by a TLD close to the tip of the index finger of the guiding hand (range: 773–1257 µS/GBq). Conclusion The chosen methodology using ED, proved to be a good concept for identifying procedure steps with an increased exposure level and to determine the time course of skin exposure and to identify procedure steps for further optimization of handling. Furthermore, miniaturized electronic dosimeters may be used for online surveillance of local exposure rates at hands and fingers.

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Amer, Hany, Mostafa Elashmawy, Huda Alazab, and El-Din Ezz. "Suitability of pure nano crystalline LiF as a TLD dosimeter for high dose gamma radiation." Nuclear Technology and Radiation Protection 33, no. 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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Murthy, K. V. R. "Applications of TLDs in Radiation Dosimetry." Defect and Diffusion Forum 341 (July 2013): 211–30. http://dx.doi.org/10.4028/www.scientific.net/ddf.341.211.

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An increasing amount of public interest in environmental monitoring programmes is being focused on the environmental impact of radiation arising from nuclear power operations and the corresponding detection of slight variations in the natural radiation background. The primary objective of individual monitoring for external radiation is to assess, and thus limit, radiation doses to individual workers. Supplementary objectives are to provide information about the trends of these doses and about the conditions in places of work and to give information in the event of accidental exposure. Depending on the kind of radiation hazard, the ICRP recommended maximum permissible dose (MPD) values. These are the maximum dose equivalent values, which are not expected to cause appreciable body injury to a person during his lifetime. Thermoluminescent Dosimetry (TLD) has been developed during 1960-70 for various applications in medicine and industry. TLD, the most advanced and most intensively studied integrating dosimeter system, has now reached the stage at which it may replace or supplement film dosimetry. TLD systems are widely applied to environmental monitoring programmes near nuclear installations. TLD systems with high reproducibility in the milli roentgen dose range are required in order to measure exposures equal to that resulting from an exposure rate of 10μR h-1 during field periods of from several days up to a year. A brief list of applications specific to radiation oncology is given here. In radiation oncology dosimetric accuracy demanded is of the order of 2-5%. TLDs offer a clear solution since their precision meets this criteria. Contents

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Mahdiraji, G. Amouzad, M. Ghomeishi, E. Dermosesian, S. Hashim, N. M. Ung, F. R. Mahamd Adikan, and D. A. Bradley. "Optical fiber based dosimeter sensor: Beyond TLD-100 limits." Sensors and Actuators A: Physical 222 (February 2015): 48–57. http://dx.doi.org/10.1016/j.sna.2014.11.017.

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Nuraeni, N., F. Iskandar, A. Waris, and F. Haryanto. "Preliminary Studies of Thermoluminescence Dosimeter (TLD) CaSO4:Dy Synthesis." Journal of Physics: Conference Series 877 (July 2017): 012065. http://dx.doi.org/10.1088/1742-6596/877/1/012065.

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Chen, Stephanie H., and Marie-Christine Brunet. "Fetal radiation exposure risk in the pregnant neurointerventionalist." Journal of NeuroInterventional Surgery 12, no. 10 (February 5, 2020): 1014–17. http://dx.doi.org/10.1136/neurintsurg-2019-015727.

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BackgroundThe prevalence of women physicians is steadily rising, but the field of neurointervention remains one of the most male-dominated subspecialties in medicine. A fear of radiation exposure, particularly during pregnancy and childbearing years, may be responsible for deterring some of the best and brightest. This is the first study to examine the amount of maternal and fetal radiation exposure during a pregnant neurointerventional fellow’s training.MethodsWe retrospectively analyzed the radiation exposure of a neurointerventional fellow prior to and during pregnancy from February 2018 to May 2019 in 758 neurointerventional cases. The collar dosimeter was used to measure overall maternal exposure and an additional fetal dosimeter was worn under two lead apron skirts to estimate fetal radiation exposure.ResultsThere was not a significant difference between pre- and post-pregnancy overall maternal radiation exposure as measured by the collar dosimeter (151 mrem pre-pregnancy and 105 mrem during pregnancy, p=0.129). Mean fluoroscopy time and fluoroscopy emission per procedure also did not differ prior to and during pregnancy. Fetal radiation exposure measurements from both the Mirion Genesis Ultra TLD dosimeter as well as the Mirion Instadose dosimeters worn under double lead apron skirts were 0 mrem for all 6 months.ConclusionThese findings suggest that, when optimal radiation safety practices are implemented, the fetal dose of a pregnant neurointerventionalist is negligible. Further studies and education are necessary to encourage women to choose neurointervention and allow practicing women neurointerventionalists to maintain their productivity during their reproductive years.

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Mukherjee, Bhaskar, Dariusz Makowski, and Stefan Simrock. "Dosimetry of high-energy electron linac produced photoneutrons and the bremsstrahlung gamma-rays using TLD-500 and TLD-700 dosimeter pairs." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 545, no. 3 (June 2005): 830–41. http://dx.doi.org/10.1016/j.nima.2005.03.120.

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Sobotka, Piotr, Bartłomiej Kliś, Zuzanna Baranowska, Katarzyna Wołoszczuk, Katarzyna Rutkowska, and Tomasz Woliński. "Efficient reading of thermoluminescent dosimeter signals using semiconductor detectors." Nukleonika 65, no. 4 (December 1, 2020): 223–27. http://dx.doi.org/10.2478/nuka-2020-0034.

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AbstractThe aim of this experimental work was to examine whether semiconductor photodetectors may be applied for the efficient reading of thermoluminescent dosimeter (TLD) signals. For this purpose, a series of experiments have been performed at the Department of Physics, Warsaw University of Technology, in cooperation with the Central Laboratory for Radiological Protection (CLOR). Specifically, the measurement system proposed here has been designed to detect a signal from TLDs that use a semiconductor detector operating in conditions analogous to those met when using commercial devices equipped with a classic photomultiplier. For the experimental tests, the TLDs were irradiated with a beam of 137Cs radiation in the accredited Laboratory for Calibration of Dosimetric and Radon Instruments. Eventually, a comparison of the results obtained with a semiconductor detector (ID120) and a commercial TLD reader with a photomultiplier tube (RADOS) were made.

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Ehlermann, D. A. E. "Comparison of ESR/TLD analyses for quartz as routine dosimeter." Applied Radiation and Isotopes 47, no. 11-12 (November 1996): 1547–50. http://dx.doi.org/10.1016/s0969-8043(96)00207-2.

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Herrati, Ammar, Mourad Bourouina, and Karima Khalal-Kouache. "Investigation of TLD-700 energy response to low energy x-ray encountered in diagnostic radiology." Open Physics 14, no. 1 (January 1, 2016): 150–58. http://dx.doi.org/10.1515/phys-2016-0016.

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AbstractThe aim of thiswork is to study the energy dependence of thermoluminescent dosimeter (TLD-700) for low energy X-ray beams encountered in conventional diagnostic radiology. In the first step, we studied some characteristics (reproducibility and linearity) of TLD-700 chips using a 137Cs source, and selected TLD chips with reproducibility better than 2.5%. Then we determined TLD-700 energy response for diagnostic radiology X-ray qualities, and investigated its influence on air kerma estimate. A maximum deviation of 60% can be obtained if TLDs are calibrated for 137Cs radiation source and used in diagnostic radiology fields. However, this deviation became less than 20% if TLDs chips are calibrated for the reference x-ray radiation quality RQR5 (recommended by the IEC 61267 standard). Consequently, we recommend calibrating this kind of TLDdetector with RQR5 diagnostic radiology X-ray quality. This method permits to obtain a good accuracy when assessing the entrance dose in diagnostic radiology procedures.

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Wang, Yiling, Min Zheng, Ling He, Jinhui Xu, Gang Yin, Jie Zhou, Yue Zhao, Ming Jiang, and Jie Wang. "Fast Model for Evaluation of the Thyroid Dosimetry During Chest Tumor Radiotherapy." Dose-Response 17, no. 4 (October 1, 2019): 155932581988915. http://dx.doi.org/10.1177/1559325819889152.

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Due to the reported high incidence of thyroid cancer induced by radiotherapy, dose assessment is significant to prevent thyroid late effects. Thyroid dosimetry can be evaluated either by entrance skin dose (ESD) measured with thermoluminescent dosimeter (TLD) arrays or by absorbed dose (AD) computed with treatment planning system. However, their correlation has hardly been reported in any publications. Moreover, the reported measurement procedures for thyroid ESD are usually inefficient. This study aims to provide a fast model for efficient acquisition of thyroid ESD and analyze the coherent relationship between ESD and AD. We conducted the study on the China radiation anthropomorphic phantom with intentionally delineated cancers, irradiated by a Varian 23EX linac. We have measured the ESD with TLD at 5 different points, while computed AD with the Oncentra Masterplan TPS. The ESD at the middle gorge of thyroid has exhibited significant linear correlation with those measured at other points. Furthermore, a regressive model has been proposed to predict thyroid AD from ESD. Consequently, it is recommended to only measure the ESD at the middle gorge of thyroid for an efficient dose assessment. The validity of the regressive model to predict thyroid AD from ESD has also been demonstrated.

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Apelmann, Kowald, Weinrich, Dischinger, Nienhaus, Seide, Martens, and Jürgens. "Radiation Dose to the Eye Lens Through Radiological Imaging Procedures at the Surgical Workplace During Trauma Surgery." International Journal of Environmental Research and Public Health 16, no. 20 (October 11, 2019): 3850. http://dx.doi.org/10.3390/ijerph16203850.

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Background: Due to the drastic reduction of the eye lens dose limit from 150 mSv per year to 20 mSv per year since 2018, the prospective investigation of the estimated dose of the eye lens by radiological imaging procedures at the surgical site during trauma surgery in the daily work process was carried out. This was also necessary because, as experience shows, with changes in surgical techniques, there are also changes in the use of radiological procedures, and thus an up-to-date inventory can provide valuable information for the assessment of occupationally induced radiation exposure of surgical personnel under the current conditions. Methods: The eye lens radiation exposure was measured over three months for five trauma surgeons, four hand surgeons and four surgical assistants with personalized LPS-TLD-TD 07 partial body dosimeters Hp (0.07). A reference dosimeter was deposited at the surgery changing room. The dosimeters were sent to the LPS (Landesanstalt für Personendosimetrie und Strahlenschutzausbildung) measuring institute (National Institute for Personal Dosimetry and Radiation Protection Training, Berlin) for evaluation after 3 months. The duration of the operation, occupation (assistant, surgeon, etc.), type of surgery (procedure, diagnosis), designation of the X-ray unit, total duration of radiation exposure per operation and dose area product per operation were recorded. Results: Both the evaluation of the dosimeters by the trauma surgeons and the evaluation of the dosimeters by the hand surgeons and the surgical assistants revealed no significant radiation exposure of the eye lens in comparison to the respective measured reference dosimeters. Conclusions: Despite the drastic reduction of the eye lens dose limit from 150 mSv per year to 20 mSv per year, the limit for orthopedic, trauma and hand surgery operations is well below the limit in this setting.

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Angelone, M., M. Chiti, and A. Esposito. "Measurement of supralinearity factor of CaF2:Tm (TLD-300) thermoluminescent dosimeter." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 117, no. 4 (October 1996): 428–30. http://dx.doi.org/10.1016/0168-583x(96)00340-0.

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Saputri, Lutfiana Desy, Budi Santoso, Agung Nugroho Oktavianto, and Febria Anita. "Analisis Dosis Serap CT Scan Thorax Dengan Computed Tomography Dose Index Dan Thermoluminescence Dosimeter." Jurnal Ilmiah Giga 20, no. 1 (March 20, 2019): 10. http://dx.doi.org/10.47313/jig.v20i1.546.

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Pemeriksaan CT scan thorax banyak digunakan dirumah sakit untuk mengetahui penyakit atau kelainan yang terdapat pada mediastinum atau paru-paru. Selama scanning, pasien mendapatkan radiasi pada pesawat CT scan. Perkiraan dosis yang diterima pasien sudah ada pada layar monitor yaitu nilai CTDI, namun untuk mengetahui dosis sebenarnya yang diterima pasien maka perlu pengukuran langsung menggunakan TLD yang ditempelkan pada tubuh pasien selama proses scanning. Tujuan penelitian ini adalah untuk mengetahui besarnya dosis yang diterima pasien selama CT scan thorax, membandingkan besar dosis yang diterima pasien dengan menggunakan TLD dan nilai CTDI yang tertera pada layar monitor selama CT scan thorax, mengetahui hasil ukur dosis masih dalam batas panduan monitor selama CT scan yang ditetapkan atau tidak, mengetahui hubungan antara hasil ukur dosis dengan DLP pada pasien selama CT Scan thorax. Penelitian diawali dengan pengukuran konsistensi keluaran tegangan tabung sinar-X (kVp Output). Lalu dilakukan pengukuran dosis radiasi pada area thorax dengan menggunakan chips TLD-100 yang ditempelkan pada permukaan area thorax terhadap 9 pasien yang berbeda-beda. Chips TLD-100 ditempelkan pada 3 titik yaitu caput humerus kanan, caput humerus kiri, dan sternum. Hasil penelitian menunjukkan bahwa (1) besarnya dosis radiasi yang diterima pasien selama CT scan thorax sebesar 16,19 mGy sampai dengan 27,66 mGy. (2) prosentasi perbedaan hasil ukur terhadap CTDI vol sebesar 0,06%-70,74%, adanya perbedaan rerata dosis pada tiga titik pengukuran yaitu caput humerus kanan sebesar 17,6 mGy, caput humerus kiri sebesar 16,52 mGy, dan sternum sebesar 25,4 mGy. (3) penerimaan dosis rata-rata pasien pada CT Scan thorax masih dalam batas panduan dosis CT scan yang ditetapkan oleh European Commission, yaitu sebesar 30 mGyuntuk CT thorax rutin, namun nilai DLP yang didapatkan berada diatas panduan dosis yang ditetapkan. (4) hasil ukur dosis berbanding lurus dengan DLP ( dose length ProduCT) yang diterima pasien.

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Ko, Seulki, Kwang Pyo Kim, Sung Bum Cho, Ye Jin Bang, Yae Won Ha, and Won Jin Lee. "Occupational Radiation Exposure and Validity of National Dosimetry Registry among Korean Interventional Radiologists." International Journal of Environmental Research and Public Health 18, no. 8 (April 15, 2021): 4195. http://dx.doi.org/10.3390/ijerph18084195.

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The national dose registry (NDR) contains essential information to help protect radiation workers from radiation-related health risks and to facilitate epidemiological studies. However, direct validation of the reported doses has not been considered. We investigated the validity of the NDR with a personal dosimeter monitoring conducted among Korean interventional radiologists. Among the 56 interventional radiologists, NDR quarterly doses were compared with actively monitored personal thermoluminescent dosimeter (TLD) doses as standard measures of validation. We conducted analyses with participants categorized according to compliance with TLD badge-wearing policies. A correlation between actively monitored doses and NDR doses was low (Spearman ρ = 0.06), and the mean actively monitored dose was significantly higher than the mean NDR dose (mean difference 0.98 mSv) in all participants. However, interventional radiologists who wore badges irregularly showed a large difference between actively monitored doses and NDR doses (mean difference 2.39 mSv), and participants who wore badges regularly showed no apparent difference between actively monitored doses and NDR doses (mean difference 0.26 mSv). This study indicated that NDR data underestimate the actual occupational radiation exposure, and the validity of these data varies according to compliance with badge-wearing policies. Considerable attention is required to interpret and utilize NDR data based on radiation workers’ compliance with badge-wearing policies.

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Eyisi-Enuka, Chinenye Evangeline, Christian Chukwuemeka Nzotta, Ebbi Donald Robinson, Akintayo Daniel Omojola, Thomas Adejoh, and Anthonio Azuka Agboje. "Determination of scatter radiation to the breast during lumbosacral x-ray examination using thermoluminescence dosimeter." Medical Science and Discovery 8, no. 5 (May 15, 2021): 315–21. http://dx.doi.org/10.36472/msd.v8i5.539.

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Objective: Exposure to ionizing radiation during radiographic examination is associated with some biological effects. The study was aimed to determine the amount of scatter radiation to the breast during lumbosacral x-ray examination. Materials and Methods: The study was a prospective, cross-sectional study carried out among 60 women referred for Lumbosacral spine radiography from September 2019 to December 2019. Ethical approval was granted by the hospital ethical committee. A single-phase mobile X-ray unit was used to dispense the radiation while a thermoluminescent dosimeter (TLD) chip was used to measure the radiation dose. The TLD chip was attached to the peri-areolar region of the left breast and held in place by a transparent adhesive tape. The TLD was carefully enclosed in a black polythene sachet before and after the investigation to shield it from background radiation. After the investigation the TLD,s were sent to the Centre for Energy Research and Training (CERT) for reading and annealing. Results: The mean age and BMI of participants were 55.32±12.35years and 29.70±7.09kg/m2 respectively. The cumulative mean (±SD) ESD to the breast was 3.87±0.87mGy. The highest scatter radiation dose was observed in the age group 60-69 years. Pearson’s correlation showed a week correlation between age and ESD. Conclusion: The study showed that there were scatter radiations to the breast during lumbosacral X-Ray investigations which was was lowest among the age group 50-59years. No significant difference was seen between AP and lateral positions. The cancer risk was 1 in 6,000 indicating that there might be needed to shield the breast while performing lumbosacral X-ray.

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Hegazy, Ehab A. "Comparison Between Thermo Luminescence Dosimeter and Planning System Dose Calculation in The Brain and Spinal Cord Tumour." JOURNAL OF ADVANCES IN PHYSICS 16, no. 1 (August 7, 2019): 272–79. http://dx.doi.org/10.24297/jap.v16i1.8375.

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Radiotherapy of Spinal cord and brain tumor requires High care due to considerable changes in the white matter of the brain, which consequently lead to a reduction of patient learning and mental skills. It is considered a very critical tumor due to high sensitivity of gross volume location and normal tissues surrounding it, including eye, heart, plate thyroid, and testis. XiO planning systems, TLD dosimeter found in Mansoura university oncology department, CMS XIO USA TPS were compared using electron and photon beams with different energies at a different site in target volume and organs at risk. We conclude that regular calibration of planning systems and direct measurement of the dose delivered to main target and organs at risk should be done to avoid the difference between XiO planning systems and direct measurement by TLd.

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Journal, Baghdad Science. "Positron Annihilation Lifetime Study on free Volume Changes in TLD by Gamma - irradiation." Baghdad Science Journal 1, no. 1 (March 7, 2004): 144–48. http://dx.doi.org/10.21123/bsj.1.1.144-148.

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Positron annihilation lifetime has been utilized for the first time to investigate the free - volume hole properties in thermolumenscent dosimeter ( TLD ) as a function of gamma-dosc . The hole volume, free volume fraction determined form orthopsitronium lifetime are found to be ?lamatically increase to large values , and then to minimum values as a function ofgamma-dose . The free - volume holes size is found to be 0.163nm’ and to have maximum of 0.166nm^ at the gamma-dose of 0.1 and 0.8 Gy, respectively-

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Freire de Souza, Luiza, and Divanízia N. Souza. "PRODUÇÃO DE DOSÍMETROS TERMOLUMINESCENTES À BASE DE MgB4O7: Dy e MgB4O7:Tm." Eclética Química Journal 38, no. 1 (October 25, 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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Shinsho, Kiyomitsu, Yuji Tomizawa, Hiroki Horikawa, Satoshi Miyajima, Hidetoshi Saitoh, and Akio Urushiyama. "Basic characteristic of a prototype tissue equivalent phantom thermoluminescence dosimeter (TEP-TLD)." Radiation Measurements 46, no. 12 (December 2011): 1912–15. http://dx.doi.org/10.1016/j.radmeas.2011.05.023.

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Kry, Stephen F., Michael Price, David Followill, Firas Mourtada, and Mohammad Salehpour. "The use of LiF (TLD-100) as an out-of-field dosimeter." Journal of Applied Clinical Medical Physics 8, no. 4 (September 2007): 169–75. http://dx.doi.org/10.1120/jacmp.v8i4.2679.

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Anggarani, Ni Kadek Nova, Johan A. E. Noor, and Bunawas Bunawas. "Dosimeter Response for Personal Eye Lens Using TLD-900 (CaSO4:Dy) in Radiation Field Beta and Photon." Natural-B 3, no. 3 (April 1, 2016): 241–46. http://dx.doi.org/10.21776/ub.natural-b.2016.003.03.06.

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PAN, LUNG-FA, YINGYI LE, YU-CHEN YEN, JUI-HUNG WENG, CHIEN-YI CHEN, CHUN-CHIEH LIANG, and LUNG-KWANG PAN. "OPTIMIZING THE TLD-100H READOUT SYSTEM UNDER VARIOUS RADIOACTIVE I-131 DOSES VIA THE REVISED TAGUCHI DYNAMIC QUALITY LOSS FUNCTION." Journal of Mechanics in Medicine and Biology 20, no. 10 (December 2020): 2040024. http://dx.doi.org/10.1142/s0219519420400242.

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The TLD-100H readout system performance under various radioactive I-131 exposure doses was optimized by four key factors via the revised Taguchi dynamic quality loss function. Taguchi dynamic analysis and the orthogonal array reorganizing the essential factors are crucial for the optimization of the thermoluminescent dosimeter (TLD) readout system given strict criteria of multiple irradiated environments and long-term exposure for calibrated TLDs. Accordingly, 96 TLD-100H chips were selected and randomly categorized into three batches with eight groups (four TLD chips in each group). Four factors, namely (1) initial temperature, (2) heating rate, (3) maximal temperature, and (4) TLD preheat time before reading were organized into eight combinations according to Taguchi suggestion, whereas each factor was preset at two levels. All 96 [Formula: see text] chips were put in three concentric circles with 30, 60, and 90 cm radii for 48 h, surrounding the radioactive 150[Formula: see text]mCi ([Formula: see text][Formula: see text]MBq) I-131 capsule and exposed to the cumulative doses of 88.2, 18.6, and 8.6[Formula: see text]mSv for the respective radii, accordingly. The TLD readings obtained from each group were analyzed to derive the sensitivity, coincidence, and reproducibility, then those were reorganized to draw four fish-bone-plots for the optimization. The optimal option for the TLD readout system implied the combination of A1 (a [Formula: see text]C initial temperature), B1 (a [Formula: see text]C/s heating rate), C1 (a [Formula: see text]C maximal temperature), and D2 (a 15[Formula: see text]s preheat time), which was further verified by the follow-up measurements. The dominant factors were A (initial temperature) and B (heating rate), whereas C (maximal temperature) and D (preheat time) were minor and provided negligible contributions to the system performance optimization.

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TOGASHI, ATSUHIKO, KOUICHI HOSHI, and RYO KAYAMORI. "MEASUREMENT OF EFFECTIVE ENERGY ON DIAGNOSTIC X-RAYS USING A THERMOLUMINESCENCE DOSIMETER (TLD)." Japanese Journal of Radiological Technology 48, no. 11 (1992): 1952–56. http://dx.doi.org/10.6009/jjrt.kj00003500337.

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Torkzadeh, F., and F. Manouchehri. "Thermal neutron fluence measurement in a research reactor using thermoluminescence dosimeter TLD-600." Journal of Radiological Protection 26, no. 1 (March 1, 2006): 97–103. http://dx.doi.org/10.1088/0952-4746/26/1/006.

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Abdel-Kader, A., H. I. Farag, and A. R. Tolba. "Thermoluminescence and storage stability of TLD-100 dosimeter irradiated with 60Co-gamma rays." Journal of Materials Science 26, no. 8 (January 1, 1991): 2240–44. http://dx.doi.org/10.1007/bf00549194.

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Kadhim, Ali Abdulhasan, Peyman Sheikhzadeh, Saeed Farzanefar, Shima Yavari, and Mohammad Reza Ay. "RADIATION DOSE ASSESSMENT TO FAMILY MEMBERS TAKING CARE OF NON-CANCEROUS THYROID PATIENTS TREATED WITH I-131 THERAPY IN NUCLEAR MEDICINE DEPARTMENT." Radiation Protection Dosimetry 190, no. 2 (June 2020): 208–16. http://dx.doi.org/10.1093/rpd/ncaa092.

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Abstract This study aimed to determine the effective doses of caregivers taking care of non-cancerous patients treated with iodine-131 (I-131). Patients (administered 185–1110 MBq of I-131) were given specific radiation safety instructions (RSI). Afterwards, caregivers were provided with thermoluminescent (TLD) dosimeter badges to be worn for 12–28 days when taking care of the patients. At the end of this period, TLD measurements were obtained. Results showed that caregivers’ mean effective dose was 0.15 ± 0.15 mSv, which is far less than the international recommendations of 5 mSv. Furthermore, the effective doses had no significant correlation with administered I-131 activity to the patients, distance from the hospital, caregivers’ age, educational level and mode of transport. Our study showed that radiation doses received by caregivers of non-cancerous patients are higher than that of cancerous patients, nevertheless their received doses were within the international limits, thereby indicating good compliance by the caregivers to RSI.

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Robinson, Ebbi D., Christian C. Nzotta, and Uwa Onwuchekwa. "Evaluation of scatter radiation to the thyroid gland attributable to brain computed tomography scan in Port Harcourt, Nigeria." International Journal of Research in Medical Sciences 7, no. 7 (June 28, 2019): 2530. http://dx.doi.org/10.18203/2320-6012.ijrms20192877.

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Background: Computed tomography (CT) is an axial imaging modality that uses X-ray. The study is to determine the amount of X-radiation that reaches the thyroid glands during brain CT.Methods: A prospective study was carried out in Rivers State University Teaching Hospital’s Radiology Department with 60 participants sent for brain CT scan. A 64 slice helical GE Optima CT machine was used while radiation dose reaching the thyroid gland was measured with themoluminiscent dosimeter (TLD) chips (TLD LiF-100). The TLD chip was placed on the anterior aspects of the neck at the level of 6th cervical vertebra (C6) and held in place with adhesive tapes. The TLD chip was later sent to the radiation dosimetric laboratory for reading. Collected data was analyzed using SPSS windows version 22.0 statistical software. A descriptive statistical tool was used to determine central tendencies. Pearson correlation and linear regression analysis models were also used to evaluate correlation between variables.Results: The mean (±SD) CTDI, DLP and brain Effective Dose were 37.265±13.098mGy, 662.451±230.782mGy-cm and 1.667±0.603mSv respectively. The Scatter X-Radiation reaching the thyroid gland and resultant Effective Dose were 5.26±3.13mSv and 0.26±0.16mSv respectively. A positive correlation between brain and thyroid gland effective doses yielded a Pearson’s correlation coefficient (r) of 0.892 within a confidence interval of 0.01 (p value of 0.01) showing significant correlation.Conclusions: The amount of radiation received by the thyroid gland during brain computed tomography scan is significant. Therefore, it is pertinent to protect the thyroid gland during the procedure.

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Nazaroh, Nazaroh. "KALIBRASI DOSIMETER SAKU GAMMA (DSG) DAN TLD/FILM BADGE (FB) DI LABORATORIUM PTKMR-BATAN." Jurnal Standardisasi 13, no. 2 (July 1, 2011): 120. http://dx.doi.org/10.31153/js.v13i2.132.

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Nurdin, W. B., Aswad, and K. Bariah. "Effect of SSD and absorbing filter in calibration process of Thermo Luminescence Dosimeter TLD-700." Journal of Physics: Conference Series 1341 (October 2019): 082029. http://dx.doi.org/10.1088/1742-6596/1341/8/082029.

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El-Aragi, G. M. "Detection of X-ray Radiations from Low Energy Focus Plasma Using Thermoluminescence Dosimeter TLD-500A." Journal of Fusion Energy 35, no. 2 (September 15, 2015): 229–34. http://dx.doi.org/10.1007/s10894-015-0005-6.

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Yamamoto, Chiaki, Bing Huan Tang, and Syozo Murata. "Research on Calibration Constant for Diagnostic X-ray Energy of TLD-MSO-S Type Dosimeter." JAPANES JOURNAL OF MEDICAL INSTRUMENTATION 64, no. 1 (January 1, 1994): 17–20. http://dx.doi.org/10.4286/ikakikaigaku.64.1_17.

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Muqmiroh, Lailatul, Soegardo Indra Praptono, Rusmanto Rusmanto, Risalatul Latifah, and Nggraini Dwi Sensusiati. "THE RADIATION DOSE PROFILE IN PEDIATRIC INTERVENTIONAL CARDIOLOGY TO ESTIMATE THE STOCHASTIC EFFECT RISK: PRELIMINARY STUDY." Journal Of Vocational Health Studies 1, no. 3 (September 14, 2018): 107. http://dx.doi.org/10.20473/jvhs.v1.i3.2018.107-112.

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Background: The specific characteristic of anatomy and physiology of children cause the risk of radiation effects received when they underwent the interventional cardiology procedures higher than an adult. Purpose: to estimate the stochastic effect risk in a pediatric patient during interventional cardiology procedures. Method: Data collection was performed by placing thermoluminescence dosimeter (TLD) on thyroid, gonad, left and right thoracic areas, and the 5th thoracic vertebrae during interventional cardiology. Result: The results showed that the greatest exposure was received around vertebrae (bone marrow) because of the superimpose X-ray on the vertebrae during the procedures. Conclusion: The greatest probability of stochastic effect that happened was leukemia. Estimation risk ratio of leukemia was 0, 9 % and thyroid cancer was 0,037%.

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Sadeghi, Nahid, and Rohollah Ahangari. "Radiological Assessment of Atmospheric Release from Tehran Research Reactor during Normal Operation by Using Pc-Cream Code." International Letters of Natural Sciences 54 (May 2016): 17–26. http://dx.doi.org/10.18052/www.scipress.com/ilns.54.17.

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In this work, radiological assessment of atmospheric release from Tehran’s Research Reactor (TRR) stack and assessment of public exposures under normal operation has been studied. To perform tasks mentioned above, Pc-Cream computer code which simulates Gaussian Dispersion air transport plume model as well as laboratory analysis of the soil and leaves samples and TLD (Thermo Luminescent Dosimeter) monitoring around the TRR site was used. Results of the Pc-Cream code showed that the annual committed and external dose received by the individual in the vicinity of the reactor is below the regulatory limit. Also, the results of laboratory analysis of available radionuclides in the soil and leaves samples showed that the concentrations are close to the background (K40=635, Th232=28, Cs137=0.29 up to 28.82, Ra226=25 (Bq[1]/Kg) in soil and K40=457, Be7≈70 (Bq/Kg) in leaves) and confirm the code results. The monitored dose values of the TLD detectors were positioned around the reactor within 500 m radius shows that the background dose in vicinity of TRR (113 μSv up to 150 μSv) is consistent with the background dose in Tehran province (125 μSv).

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Sasaki, K., Y. Shiota, and M. Miura. "EP-1703 Dose Evaluation of Build-up Region of Photon Beam using Thermoluminescence Dosimeter (TLD) Sheet." Radiotherapy and Oncology 133 (April 2019): S917. http://dx.doi.org/10.1016/s0167-8140(19)32123-1.

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Tambe, C., R. Kinhikar, Y. Ghadi, D. Deshpande, R. Kenjale, and P. Desai. "PV-059: Dosimetric verification of Cs-137 Blood Irradiator using TLD, Radchromic film and FBX dosimeter." Radiotherapy and Oncology 141 (December 2019): S25—S26. http://dx.doi.org/10.1016/s0167-8140(20)30543-0.

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Kim, J. L., J. I. Lee, A. S. Pradhan, B. H. Kim, and J. S. Kim. "Further studies on the dosimetric characteristics of LiF:Mg,Cu,Si—A high sensitivity thermoluminescence dosimeter (TLD)." Radiation Measurements 43, no. 2-6 (February 2008): 446–49. http://dx.doi.org/10.1016/j.radmeas.2007.10.045.

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Mukherjee, B., J. Lambert, R. Hentschel, E. Negodin, and J. Farr. "An ultra sensitive fast neutron area monitor using gadolinium covered aluminium oxide dosimeter (TLD-500) chips." Radiation Measurements 46, no. 12 (December 2011): 1698–700. http://dx.doi.org/10.1016/j.radmeas.2011.05.045.

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Kumar, Manoj, J. Udhayakumar, Shyamala S. Gandhi, A. K. Satpati, Ashutosh Dash, and Meera Venkatesh. "An electrochemical method for the preparation of 63Ni source for the calibration of thermoluminescence dosimeter (TLD)." Applied Radiation and Isotopes 67, no. 6 (June 2009): 1042–49. http://dx.doi.org/10.1016/j.apradiso.2009.01.078.

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Tien-Ko Wang, Pin-Chieh Hsu, and Pao-Shan Weng. "Application of CaF2: Tm (TLD-300) dosimeter to the discrimination between alpha, beta and gamma radiation." International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes 40, no. 4 (January 1989): 329–35. http://dx.doi.org/10.1016/0883-2889(89)90226-8.

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García-Haro, A. R., R. Bernal, C. Cruz-Vázquez, G. Kitis, and V. M. Castaño. "Thermoluminescence Properties of Novel Self-Agglomerating CaSO4:Eu Phosphors Obtained by an Environmentally Friendly Method." Advances in Materials Science and Engineering 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/1712383.

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In this work, we report the thermoluminescence (TL) properties of self-agglomerating CaSO4:Eu samples obtained by an environmentally friendly coprecipitation technique. No binding material is needed to form solid CaSO4:Eu samples. Samples exposed to beta particle irradiation exhibit a TL maximum at 473.15 K when a 5 K/s heating rate is used, they are two times more sensitive than the TLD-100 commercial dosimeter, and their lower detection limit was determined to be less than 0.69 mGy. The computerized glow curve deconvolution carried out fitting the residual glow curves from McKeever method revealed that the whole glow curve is composed of four individual TL peaks with intermediate-order kinetics. The main peak order kinetics is b = 1.48. This result agrees with that computed using Chen’s formula.

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Journal articles on the topic 'TLD dosimeter'

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