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Luminescence spectra have been measured in TlBr doped with iodine ions under pulsed-light excitation. Two broad emission bands were observed at 2.2 and 2.45eV. The emission band at 2.2eV decays non-exponentially below 20K and was attributed to radiative annihilation of a localized exciton bound to an I - ion formed by tunneling a hole to an electron trapped at a distant lattice position. The...
BaClI and BaBrI were prepared by the solid-state reaction method. For these two newly prepared compounds, from their high resolution powder X-ray diffraction (XRD) patterns, it is possible to assign them an orthorhombic structure. Interest in these compounds also stems from their application in X-ray screen intensifiers. Europium-doped BaClI and BaBrI were taken up for luminescence studies. The photoluminescence...
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