Crystal growth and characterization of Eu2+ doped Cs1-xRbxCaBr3

• Published in: Journal of alloys and compounds 2020-03, Vol.816, p.152594, Article 152594
• Main Authors: Rebrova, N.V., Grippa, A.Yu, Boiaryntseva, I.A., Berastegui, P., Gorbacheva, T.E., Pedash, V.Yu, Galkin, S.N., Kononets, V.V., Datsko, Yu.N., Cherginets, V.L.
• Format: Article
• Language: English
• Subjects: Bridgman method; Crystal growth; Crystals; Energy resolution; Europium; Inorganic materials; Optical properties; Photoluminescence; Scintillation; Solid solutions; X-ray and gamma-ray spectroscopies; X-ray diffraction
• ISSN: 0925-8388; 1873-4669; 1873-4669
• DOI: 10.1016/j.jallcom.2019.152594

A series of Eu2+ doped Cs1-xRbxCaBr3 solid solutions were grown using the Bridgman-Stockbarger technique. Their photoluminescence and scintillation properties are studied. Upon optical and X-ray excitation, the Cs1-xRbxCaBr3 and Eu2+ activated samples show a band, which can be attributed to the 5d-4f transition in Eu2+. The decay time constants become shorter with increasing Rb content and lie in the range of 3–4 μs. The scintillation performance of solid solutions Cs1-xRbxCa0.95Eu0.05Br3 is improved compared with the end members (CsCa0.95Eu0.05Br3 and RbCa0.95Eu0.05Br3). The best energy resolution of 6.4% at 662 keV was determined for Cs0.2Rb0.8Ca0.95Eu0.05Br3, and the best light yield, equal to 61.2% of NaI:Tl, was demonstrated by Cs0.4Rb0.6Ca0.95Eu0.05Br3. [Display omitted] •Cs1-xRbxCa0.95Eu0.05Br3 crystals were grown using the Bridgman-Stockbarger technique.•Their photoluminescence and scintillation properties have been investigated.•The light yield of the Cs0.4Rb0.6Ca0.95Eu0.05Br3 sample is 61.2% compared to NaI:Tl.•The energy resolution of the sample Cs0.2Rb0.8Ca0.95Eu0.05Br3 is 6.4%.