New high performing scintillators: RbSr2Br5:Eu and RbSr2I5:Eu
Source abstract
Abstract
Abstract We report the crystal growth and scintillation properties of two new ternary metal halide scintillators, RbSr 2 Br 5 and RbSr 2 I 5 , activated with divalent europium. Transparent 7 mm diameter single crystals with 2.5% Eu 2+ were grown in evacuated quartz ampoules via the Bridgman technique. RbSr 2 Br 5 and RbSr 2 I 5 have monoclinic crystal structures with densities of 4.18 g/cm 3 and 4.55 g/cm 3 respectively. These materials are hygroscopic and have some intrinsic radioactivity due to the presence of 87 Rb. Luminescence properties typical of the 5d-4f radiative transition in Eu 2+ were observed. The X-ray excited emissions consisted of singular peaks centered at 429 nm for RbSr 2 Br 5 :Eu 2.5% and 445 nm for RbSr 2 I 4 :Eu 2.5%. RbSr 2 Br 5 :Eu 2.5% had a light yield of 64,700 photons/MeV, with an energy resolution of 4.0%, and RbSr 2 I 5 :Eu 2.5% had a light yield of 90,400 ph/MeV with an energy resolution of 3.0% at 662 keV. Both crystals have an excellent proportional response over a wide range of gamma-ray energies.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Radiation Detection and Scintillator Technologies · Luminescence Properties of Advanced Materials · Terahertz technology and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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