Crystal Growth and Characterization of Europium-Doped Rubidium Calcium Bromide Scintillators
IEEE Transactions on Nuclear Science(2023)
摘要
National security strategies like gamma spectroscopy and high-energy X-ray radiography are limited, in part, by the scintillator used, prompting research into novel materials with improved properties. In this work, Eu
$^{2+}$
activated rubidium calcium bromide scintillators were grown via the vertical Bridgman method with a range of dopant concentrations. Light yield, energy resolution, and the afterglow of Rb
4
CaBr
6
:Eu and RbCaBr
3
:Eu improved with increasing Eu
$^{2+}$
concentration, and scintillation decay time increased. The highest light yields of Rb
4
CaBr
6
:Eu and RbCaBr
3
:Eu were 71000 and 45000 ph/MeV, respectively.
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关键词
Crystal growth,inorganic scintillators,security applications
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