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Fluorescence Processes and Scintillation of CeF_{3} Crystal Excited by UV and X-Ray Synchrotron Radiation

100%

Pédrini C., Belsky A., Moine B., Bouttet D.

Acta Physica Polonica A

1993

vol. 84

issue 5

953-957

Photoluminescence properties of CeF_{3} have been investigated. Two kinds of emitting centers have been identified: regular Ce^{3+} sites exhibiting two close emission bands (285 and 300 nm) and a fast fluorescence (20 ns) and several physically different perturbed Ce^{3+} 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.

Energy Transfer Mechanisms and Excited State Dynamics of Yb^{3+}, Tm^{3+} and Ho^{3+} Doped Gd_{3}Ga_{5}O_{12} Single Crystals

88%

Brenier A., Courrol L., Pédrini C., Madej C., Boulon G.

Acta Physica Polonica A

1993

vol. 84

issue 5

931-939

The transfer mechanisms occurring in ytterbium, thulium and holmium doped gadolinium gallium garnet crystals are presented. Various models are used to modelize the up- and down-conversion processes. They lead to a good description of the excited state dynamics and provide information about the efficiencies of the transfers.

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2 Acta Physica Polonica A

2 1993

2 Pédrini C.

1 Belsky A.

1 Boulon G.

1 Bouttet D.

1 Brenier A.

1 Courrol L.

1 Madej C.

1 Moine B.

Search results

Fluorescence Processes and Scintillation of CeF_{3} Crystal Excited by UV and X-Ray Synchrotron Radiation

Energy Transfer Mechanisms and Excited State Dynamics of Yb^{3+}, Tm^{3+} and Ho^{3+} Doped Gd_{3}Ga_{5}O_{12} Single Crystals