Funct. Mater. 2015; 22 (4): 429-433.
Obtaining and scintillation properties of crystals based on Eu2+ doped Ba(Br0.9Cl0.1)2 solid solution
[1] Institute for Scintillation Materials, STC "Institute for Single Crystals ",National Academy of Sciences of Ukraine, 60 Lenin Ave., 61001 Kharkiv, Ukraine
[2] Institute for Single Crystals, STC "Institute for Single Crystals", National Academy of Sciences of Ukraine, 60 Lenin Ave., 61001 Kharkiv, Ukraine
Scintillation crystals based on BaBr2-BaCl2 solid solution corresponding to minimal melting point in the phase diagram doped with Eu2+ (from 0.3 to 3 mol. %) were grown by Bridgman-Stockbarger method. The X-ray luminescence spectra of pure matrix of Ba(Br0.9Cl0.1)2 composition includes wide emission band with the maximum which position is placed near 410 nm. The emission spectra of the Eu2+-activated materials contain narrow bands with the maxima at 411-413 nm. The absolute light yield of Ba(Br0.9Cl0.1)2:Eu2+ material doped with 3 mol. % of the activator is ca. 32600 photons per MeV and the best energetic resolution is 9.5 %. The decay curve for the studied materials is described by one component with the time constant of 70 ns. Distribution coefficient of Eu2+ in the studied matrix is estimated as k = 0.72±0.05. All the obtained parameters are close to those of BaBr2:Eu2+ single crystals obtained under similar conditions.
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