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Scintillation properties of crystals based on ternary bromides of calcium and alkali metals activated with europium
Author(s) -
Rebrova N. V.,
Grippa A. Yu.,
Pushak A. S.,
Gorbacheva T. E.,
Pedash V. Yu.,
Tarasov V. A.,
Cherginets V. L.
Publication year - 2017
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201600404
Subject(s) - europium , scintillation , scintillator , analytical chemistry (journal) , luminescence , ternary operation , alkali metal , phosphor , chemistry , yield (engineering) , materials science , nuclear chemistry , optics , physics , organic chemistry , chromatography , detector , computer science , metallurgy , programming language , optoelectronics
Single crystals of new scintillation materials ACaBr 3 :Eu 2+ (A = K, Rb) were grown using the Bridgman–Stockbarger method. The luminescence spectra of RbCa 1‐x Eu x Br 3 crystals include a single band with a maximum which position shifts from 433 to 443 nm with the increase of mole fraction of Eu 2+ from 0.005 to 0.08. The decay of the scintillation pulse can be described using single component and the decay time rises towards concentration of Eu 2+ in crystals from 2.70 μs (x = 0.03) to 3.14 μs (x = 0.05). The relative light yield achieves 77 per cent vs. NaI:Tl for RbCa 0.92 Eu 0.08 Cl 3 sample and the energy resolution is 8.2%. Comparing with the K‐based analogs RbCa 1‐x Eu x Br 3 materials are more stable and they are considerably brighter scintillators than CsCa 1‐x Eu x Br 3 .
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