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Study of influence of radiation defects on optical and luminescence properties of CaF2 crystals
V. T. Maslyuk, I. G. Megela, T. O. Viyeru-Vasilitsa*, I. Yu. RomanAbstract: Influence of electron irradiation with energy of 10 MeV at room temperature to the optical and luminescent properties of CaF2 crystals has been studied. The kinetics of the long-term phosphorescence and thermoluminescence on irradiation intensity and dose was carried out. In irradiated samples, the additional band of the optical absorption was observed which is proportional to the irradiation dose and annealed at 175 °C. Concentration and speed of introduction of absorbing centers in the irradiated crystals has been evaluated.
Keywords: radiation defects, deep levels, internal stress, single crystals of germanium.
References:1. J. Azorin. Thermoluminescense and optical properties of some dosimetric materials. Journal of Thermal Analysis 50 (1997) 81. https://doi.org/10.1007/BF01979551
2. M. Ranogajec-Komor. Thermoluminescence Dosimetry - Application in Environmental Monitoring. Radiation Safety Management 2 (2002) 2. https://www.jstage.jst.go.jp/article/rsm2002/2/1/2_1_2/_pdf
3. B. Obryk, P. Bilski, P. Olko. Method of thermoluminescent measurement of radiation doses from mi-crograys up to a megagray with a single LiF:Mg,Cu,P detector. Radiation Protection Dosimetry 144 (2011) 543. https://doi.org/10.1093/rpd/ncq339
4. P. Bilski, B. Obryk, Z. Stuglik. Behaviour of LiF:Mg,Cu,P and LiF:Mg,Ti thermoluminescent detectors for electron doses up to 1 MGy. Radiation Measurement 45 (2010) 576. https://doi.org/10.1016/j.radmeas.2009.11.046
5. A. Triolo, M. Brai, A. Bartolotta, M. Maralle. Anomalous behaviour of LiF:Mg,Cu,P (TLD100H) irradiated with electron beams. Nucl. Instrum. Methods Phys. Res. A 568 (2006) 784. https://doi.org/10.1016/j.nima.2006.08.082
6. N.G. Belokon, V.V. Kornyeyeva. Thermoluminescent dosimetry: Trends of development. Ukrayinskyi radiologichnyi zhurnal 12 (2004) 88. (Ukr) http://medradiologia.kharkov.ua/assets/files/arch/2004/1/p88_94.pdf
7. V.T. Maslyuk, T.A. Vieru-Vasilitsa, I.G. Megela et al. Phosphorescence and thermoluminescence of CaF2 crystals irradiated on Microtron M-30. Book of Abstracts. VIII Conf. “High Energy Physics, Nuclear Physics and Accelerators”, Kharkiv, 16 - 20 March, 2015 (Kharkiv, 2015) p. 107. (Rus)
8. T.O. V³eru-Vas³l³tsa, V.T. Maslyuk, ².G. Megela, ².Yu. Roman. Optical and luminescent properties of CaF2 dosimetry crystals irradiated by accelerated electrons on Microtron M-30. Abstracts of Int. Conf. for young scientists and graduate students, ²EF-2015, Uzhgorod, 18 - 22 May, 2015 (Uzhgorod, 2015) p. 45. (Ukr)
9. T.O. Okuneva, V.T. Maslyuk, ².G. Megela. Naukovyj v³snyk Uzhgorod. universytetu. Ser. "F³zyka" 29 (2011) 115. (Ukr)
10. V. Maslyuk, I. Megela, T. Okunieva et al. On the possibility of the use of the long-term phosphorescence of the Li2B4O7:Cu and Li2B4O7:Mn crystals for the high-current electron beam dosimetry. Proc. of the 2-nd Int. Conf. on Radiation and Dosimetry in Various Fields of Research, RAD-2014, Nish, Serbia, 27 - 30 May, 2014 (Nish, 2014) p. 215.11. V. Maslyuk, I. Megela, T. Okunieva et al. Specific features of the influence of high-current high-energy electron beams on the luminescent properties of undoped and Nb, Fe-doped Al2O3 crystals. Radiation Protection Dosimetry 162(1-2) (2014) 34. https://doi.org/10.1093/rpd/ncu213
12. R.K. Sinha, M.L. Mukherjee. On the kinetics of phosphorescence and high-temperature glow peak in CaF2: Pr single crystals. Physica Status Solidi (b) 105 (1981) 69. https://doi.org/10.1002/pssb.2221050106
13. V.V. Polugrudov, I.V. Grigorov. Phosphorescence of CaF2-Dy. Fizika Tverdogo Tela 46(10) (2004) 1781. (Rus) http://journals.ioffe.ru/articles/viewPDF/4385
14. A.A. Vorobjev. Color centers in alkali halide crystals (Tomsk, 1968) 390 p. (Rus)