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International Conference 147Nuclear Science and its Application148 Sam


Section II Radiation Physics of Condensed Matter RADIATION DEFECT FORMATION IN BaFI CRYSTALS 23Uteniyazova AB1Karakalpak State University Nukus Uzbekistan Institute of Nuclear Physics Tashkent Uzbeki

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1 International Conference “Nuclear S
International Conference “Nuclear Science and its Application”, Samarkand, Uzbekistan, September 25-28, 2012 Section II. Radiation Physics of Condensed Matter RADIATION DEFECT FORMATION IN BaFI CRYSTALS 2,3Uteniyazova A.B. 1Karakalpak State University, Nukus, Uzbekistan Institute of Nuclear Physics, Tashkent, Uzbekistan Uzbekistan State Art Institute, Tashkent, Uzbekistan 4 International Conference “Nuclear Science and its Application”, Samarkand, Uzbekistan, September 25-28, 2012 Section II. Radiation Physics of Condensed Matter 2003004005006007000,00,10,70,81,21,3 Fig.1. The optical absorption spectra of unirradiated (1) and -irradiated with a dose of 4,8·10 rad (2) BaFI:Tl crystals. The bands detected in irradiated samples at 270, 370, 480 and 610 nm are due to Ftively. We assume that the bands at 20

2 8 and 390 nm are due to I.Nuritdinov, B
8 and 390 nm are due to I.Nuritdinov, B.T.Atashov, A.B.Uteniyazova, K. Turdanov. Defect formation in gamma-irradiated BaFI crystals // Inorganic Materials, 2011, V. 47, 7. P.884–886. LOR CENTRES IN FIBER LIGHT-GUIDES IN Institute of Nuclear Physics, Tashkent, Uzbekistan Presently it is established that in visible spectr(FLG) one non-elementary band with 610 nm is observed. In [1,2] on the basis of research of optical losses spectra at 300K of preliminary irraous doses of gamma quanta of Co-60 it was concluded that there was band with maximum at 550-570 nm in short wave side of the band with 610 nm maximum. It is supposed that for appearance of 610 nm band the following types of non-bridge oxygen atom: and peroxide radicals are responsible. The nature of defect centre responsible for band with maximum at 550-570 nm was not established