Radioluminescent, thermoluminescent and dosimetric properties of X-ray phosphors

Semiconductor Physics, Quantum Electronics & Optoelectronics, 3 (2), P. 240-243 (2000)
https://doi.org/10.15407/spqeo3.02.240

PACS: 78.60.- b, Kn, Ya

Radioluminescent, thermoluminescent and dosimetric properties of X-ray phosphors

M. Ignatovych¹, A. Kelemen², N. Otvas², A. Peto² and V. Ogenko¹

1- Institute for Surface Chemistry of National Academy of Sciences of Ukraine, 31 Prospect Nauky, Kyiv, 252028, Ukraine. FAX: 380-44-264 04-46
2- Institute for Isotope and Surface Chemistry, Hungarian Academy of Sciences, Budapest P. O. Box 77, 1525, Hungary. FAX:36-1-395-9002

Semiconductor Physics, Quantum Electronics & Optoelectronics. 2000. V. 3, N 2. P. 240-243.

Abstract. Time-resolved radioluminescence (RL) of X-ray phosphors: BaFCl:Eu, ZnS.CdS:Ag and Y₂О₃:Еu, which exhibited ultraviolet (l_max = 390 nm), yellow-green, (l_max = 530 nm) and red (l_max=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.

Keywords: X-ray phosphor, radioluminescence, thermoluminescence, dosimetry.

Paper received 12.10.99; revised manuscript received 04.01.00; accepted for publication 21.03.00.

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