Ce3+ activated LaBr3?xIx

High-light-yield and fast-response mixed halide scintillators

Journal article (2008)
Department
Radiation, Radionuclides and Reactors (AS) (TU Delft)
Copyright: © 2008 The Author(s); American Institute of Physics
DOI: https://doi.org/doi:10.1063/1.2930884
Scintillation X-ray diffraction Cerium Luminescence Lanthanum compounds Lattice constants Gamma-ray effects
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Published Date

22-05-2008

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Source:

Journal of Applied Physics, 103 (10), 2008

ISSN:

0021-8979

Source:

http://link.aip.org/link/JAPIAU/v103/i10/p103517/s1

Faculty

Applied Sciences

Department

Radiation, Radionuclides and Reactors

Abstract

Here, we report the scintillation properties of LaBr3?xIx: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 58?000?photons/MeV, whereas LaBr0.75I2.25:5%Ce3+ shows the fastest scintillation decay time of 12 ns under 662 keV ?-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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