Abstracts 2006

Abstract of Publication No. 559

M. D. Birowosuto, P. Dorenbos, C. W. E. van Eijk, K. W. Krämer and H. U. Güdel
PrBr3: Ce3+: A New Fast Lanthanide Trihalide Scintillator
IEEE Trans. Nucl. Sci. 53, 3028-3030 (2006)      Full Text (PDF)      DOI-Link     

Abstract: We present PrBr3: Ce3+ as a new member of the lanthanide trihalide scintillator family. This compound has the same crystal structure as its cousin LaBr3: Ce3+. The calculated density rr (5.33 g/cm3) and the effective atomic number Zeff (48.27) are higher than those of LaBr3: Ce3+ (rr = 5.07 g/cm3 and Zeff = 46.90). This results in a shorter total attenuation length of 2.09 cm for 511 keV g-ray excitation. Lower light yield than that of LaBr3: Ce3+ is observed for PrBr3: 5% Ce3+ (16000 photons/MeV) and 20% Ce3+ (21000 photons/MeV) versus 70000 photons/MeV in LaBr3: Ce3+. Scintillation decay curves of those crystals are non exponential and their decay times are faster than 10 ns. The scintillation properties of undoped PrBr3 are also presented.

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