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Radioluminescent, thermoluminescent and dosimetric properties of X-ray phosphors
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- Відділення фізики і астрономії
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- Semiconductor Physics Quantum Electronics & Optoelectronics
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- Semiconductor Physics Quantum Electronics & Optoelectronics, 2000, том 3
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- Semicond. Physics Quantum Electronics & Optoelectronics, 2000, № 2
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Radioluminescent, thermoluminescent and dosimetric properties of X-ray phosphors
Інший ID:
PACS: 78.60.- b, Kn, Ya
Посилання:
Radioluminescent, thermoluminescent and dosimetric properties of X-ray phosphors / M. Ignatovych, A. Kelemen, N. Otvas, A. Peto, V. Ogenko // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2000. — Т. 3, № 2. — С. 240-243. — Бібліогр.: 7 назв. — англ.
Підтримка:
This study is part of an Agreement of scientific collaboration between the Academy of Sciences of Ukraine and Hungary and was alsofinancially supported in part by the Hungarian Science Foundation, No. OTKA T026070. Authors also highly appreciate the kind help of Dr. M. Osvay for performing the dose-rate evaluation by TL chips. Special thanks are addressed to the LPR-4 electron accelerator staff.
Дата:
2000
Переглядів:
687
Завантажень:
362
Анотація:
Time-resolved radioluminescence (RL) of X-ray phosphors: BaFCl:Eu, ZnS.CdS:Ag and Y₂О₃:Еu, which exhibited ultraviolet (lmax = 390 nm), yellow-green, (lmax = 530 nm) and red (lmax=620 nm) luminescence respectively, have been measured. For tested phosphors a good proportionality between the light output of the radioluminescence and the dose rate in the region of dose rates from 3 to 45 MGy/s has been obtained. It was also revealed that the emitting properties of all phosphors are preserved after high-dose (10⁴ Gy) and high temperature (500°C) annealing the samples. Thermoluminescent (TL) characterization of Sr₃(PO₄)₂:Eu and BaFCl:Eu under X-ray, beta and gamma irradiation have been performed. Linear TL dose dependence under irradiation dose in the mGy - Gy region was revealed, which makes these phosphors suitable also for luminescence dosimetry in the low doses region. Thus, the main characteristics of phosphors: i) the high conversion efficiency, ii) the good dose-rate proportionality, iii) the radiation stability allow to consider these materials as promising for high-energy and high dose rate dosimetry.
