Fluorescence Processes and Scintillation of CeF3 Crystal Excited by UV and X-Ray Synchrotron Radiation
C. Pédrinia, A.N. Belskyb, B. Moinea and D. Boutteta
aLaboratoire de Physico-Chimie des Matériaux Luminescents, Université Claude Bernard Lyon I, URA 442 CNRS, 43, Boulevard du 11 Novembre 1918, Bgt. 205, 69622 Villeurbanne cedex, France
bSynchrotron Radiation Laboratory, Moscow State University, 117234 Moskva, Russia
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Photoluminescence properties of CeF3 have been investigated. Two kinds of emitting centers have been identified: regular Ce3+ sites exhibiting two close emission bands (285 and 300 nm) and a fast fluorescence (20 ns) and several physically different perturbed Ce3+ sites giving rise to a broad emission band near 340 nm and a longer fluorescence (30-40 ns) the decay time of which varies with wavelength. An energy transfer occurs between these two kinds of centers. Scintillation properties have been studied under UV and X-ray excitation. The additional fast decay always observed at short time under ionizing radiation is interpreted by a temperature dependent luminescence quenching phenomenon due to high excitation density.
DOI: 10.12693/APhysPolA.84.953
PACS numbers: 71.35.+z, 78.55.Hx, 78.70.En