Accumulation features and TL of TLD-500 detectors in a wide temperature range at pulsed and continuous high-dose irradiation |
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| Affiliation: | 1. Radiation Laboratory, Institute of Industrial Ecology, UB RAS, Ekaterinburg, Russia;2. Department of Experimental Physics, Ural Federal University, Ekaterinburg, Russia;1. Peter the Great Saint-Petersburg Рolytechnic University, Polytekhnicheskaya 29, 195251, St. Petersburg, Russia;2. Philips Research Eindhoven, High Tech Campus 34, 5656 AE, Eindhoven, The Netherlands;1. Health Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India;2. Raja Ramanna Centre for Advanced Technology, Indore 452013, India;3. Indus Operations and Accelerator Physics Design Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, India;4. Health, Safety & Environment Group, Bhabha Atomic Research Centre, Mumbai 400085, India;1. Soreq Nuclear Research Center, Yavne, 81800, Israel;2. Nuclear Engineering Unit, Ben Gurion University of the Negev, Beersheva, Israel;3. Physics Department, Ben Gurion University of the Negev, Beersheva, Israel;4. Physics Unit, Sami Shamoon College of Engineering, Beersheva, Israel;5. Nuclear Research Center Negev, Beersheva, Israel;1. E.ON Technologies GmbH, D 45896 Gelsenkirchen, Germany;2. E.ON Technologies (Ratcliffe) Ltd., Technology Centre, Ratcliffe-on-Soar, NG11 0EE, Nottingham, UK;1. Research Center, Dongnam Inst. of Radiological & Medical Sciences, Busan 619-953, Republic of Korea;2. Department of Physics, Dong-A University, Busan 604-714, Republic of Korea;3. Department of Biomedical Engineering, Inje University, Gimhae, Gyeongnam 621-749, Republic of Korea;4. Department of Advanced Nuclear Engineering, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea;5. Department of Physics, Kyungpook National University, Daegu 702-701, Republic of Korea;1. National Center for Chronic and Noncommunicable Disease Control and Prevention, Chinese CDC, Beijing 100050, China;2. National Institute for Nutrition and Health, Chinese CDC, Beijing 100050, China;3. Beijing Center for Diseases Prevention and Control, Beijing 100013, China;4. Zhejiang Center for Diseases Prevention and Control, Hangzhou 310051, Zhejiang, China;5. College of Applied Arts and Science of Beijing Union University, Beijing 100191, China |
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| Abstract: | The results of a comparative research of thermoluminescence (TL) of TLD-500 detectors based on anion-defective corundum irradiated with continuous and pulsed X-ray and pulsed electron beams in a range of doses of 0.3 ÷ 107 Gy, dose rates of 0.02–2.6·1011 Gy/s, and in a temperature range of 300–950 K are presented. It is found that, in contrast to continuous irradiation, upon pulsed irradiation with a duration of 10 ns and dose rate of PP ≥ 5·106 Gy/s, the first linear region of dose dependences for TL peaks at 450, 580 and 830 K is, instead of saturation, followed by a second one with a smaller slope at doses near 2, 200 and 103 Gy. Moreover, the slope of the second region increases with growing PP. It was also found that dose dependence for the peak at 830 K in the area of the first linear region at 10–103 Gy remains invariable at PP ≤ 1010 Gy/s. It is shown that the upper limit of doses registered by TLD-500 detectors can be increased to 2·103 and 6·106 Gy for continuous and pulsed irradiation, respectively. New broadband UV luminescence with a maximum hν = 4.1 eV and half width H = 0.85 eV was registered within the TL peak spectrum at 830 K. Besides, the optical depletion spectrum in which a single band with hν = 5.2 eV and H = 1.6 eV is observed was investigated for a trap causing a peak at 830 K. |
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| Keywords: | Anion-defective corundum Thermoluminescence Pulsed irradiation Continuous irradiation High-dose high-temperature measurements |
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