| Autor: |
Gundiah, G, Gascón, M, Bizarri, G, Derenzo, SE, Bourret-Courchesne, ED |
| Jazyk: |
angličtina |
| Rok vydání: |
2015 |
| Zdroj: |
Gundiah, G; Gascón, M; Bizarri, G; Derenzo, SE; & Bourret-Courchesne, ED. (2015). Structure and scintillation of Eu2+-activated calcium bromide iodide. Journal of Luminescence, 159, 274-279. doi: 10.1016/j.jlumin.2014.11.031. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/4g78w4xs |
| DOI: |
10.1016/j.jlumin.2014.11.031. |
| Popis: |
© 2015, Elsevier. All rights reserved. We report the structure and scintillation properties of Eu2+-activated calcium bromide iodide. CaBr0.7I1.3was the only composition that could be synthesized in the CaBr2-CaI2system. The compound has an effective atomic number of 47 and crystallizes in a trigonal crystal system with the R-3 space group and a density of 3.93 g/cc. The structure is layered and contains Ca in an octahedral environment with the Br/I anions jointly occupying a single site. Eu2+-activated samples show an intense narrow emission, characteristic of the 5d-4f transition of Eu2+, when excited with UV or X-rays. The sample with 0.5% Eu shows a light output of 63,000 ph/MeV at 662 keV with 96% of the light emitted with a monoexponential decay time of 1332 ns. An energy resolution of 10.4% full width at half maximum (FWHM) has been achieved for 662 keV gamma rays at room temperature. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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