Abstracts 2008

Abstract of Publication No. 586

M. D. Birowosuto, P. Dorenbos, K. W. Krämer and H. U. Güdel
Ce3+ activated LaBr3xIx: High-light-yield and fast-response mixed halide scintillators
J. Appl. Phys. 103, 103517/1-6 (2008)      Full Text (PDF)      DOI-Link     

Abstract: Here, we report the scintillation properties of LaBr3xIx:5%Ce3+ with four different compositions of x, i.e., x=0.75, 1.5, 2, and 2.25. Radioluminescence spectra reveal a shift of the emission wavelength with the LaBr3 to LaI3 ratio. LaBr1.5I1.5:5%Ce3+ shows the highest scintillation light yield of 58000 photons/MeV, whereas LaBr0.75I2.25:5%Ce3+ shows the fastest scintillation decay time of 12 ns under 662 keV g-ray excitation. This decay time is faster than that of 16 ns in LaBr3:Ce3+. The temperature dependence of radioluminescence spectra is presented. The structures and lattice parameters of the materials were determined from powder x-ray diffraction.

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