Scintillation properties of selected oxide monocrystals activated with Ce and Pr

Wojtowicz, A.J.; Drozdowski, Winicjusz; Wiśniewski, D.; Lefaucheur, J.; Galazka, Zbigniew; Gou, Zhenkun; Łukasiewicz, T.; Kisielewski, J.

doi:10.1016/j.optmat.2004.09.029

Cited by 81 publications

(58 citation statements)

References 11 publications

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“…1 -right) showing that the sol-gel powders have a main crystalline phase composition similar to the monocrystals. Beside the main reflections of the Re 2 SiO 5 C2/c phase, the SG samples show a few low intensity peaks indicating the presence of a small amount of a secondary phase attributable to the presence of lutetium pyrosilicates (Re 2 The optical properties of the two classes of samples were analyzed by comparing the PL spectra related to the main cerium emission in the 400-500 nm spectral range (Fig. 2).…”

Section: Resultsmentioning

confidence: 99%

“…Within the family, Re oxyorthosilicates, Re 2 SiO 5 , and in particular cerium doped lutetium crystals (Lu 2 SiO 5 , LSO), yttrium crystals (Y 2 SiO 5 , YSO) and their solid solutions (Lu 2Àx Y x SiO 5 , LYSO), gained a far-reaching role because of the application as scintillators for ionizing radiations. [1][2][3] The leading characteristics of these materials are the high stopping power for high energy photons (gamma at 511 KeV), successfully employed in the positron emission tomography (PET), and the scintillation time of about 40 ns, much lower than other widely used conventional scintillators (i.e. BGO 300 ns, CsI 900 ns).…”

Section: Introductionmentioning

confidence: 99%

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Optical and structural characterization of cerium doped LYSO sol–gel polycrystal films: potential application as scintillator panel for X-ray imaging

Ricci¹,

Carbonaro²,

Casu³

et al. 2011

J. Mater. Chem.

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The optical and structural properties of sol-gel prepared polycrystalline films of Cerium doped Lutetium and Yttrium oxyorthosilicates (Ce:LYSO) are investigated by means of optical spectroscopy, XRD diffraction and Raman spectroscopy. The sol-gel samples are compared to commercially available Ce-doped LYSO single crystals, and a detailed study of the emission properties from the different cerium sites is performed. The main result is that the polycrystalline films do show very good radioluminescence properties for possible applications as X-ray scintillating panels. The structural characterization indicates that the sol-gel polycrystals have similar phase composition to commercial monocrystals; concerning the excitation and emission properties, the same radiative recombination channels are observed in the polycrystals and commercial monocrystals with a slightly faster decay time in the first case. In addition, low temperature measurements (8 K) indicate the presence of a nonradiative cross-relaxation mechanism among cerium ions in the sol-gel grown samples in the two possible crystallographic sites. The results indicate the possibility to develop sol-gel synthesized polycrystalline thin films as scintillating materials in the X-ray energy range.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optical and structural characterization of cerium doped LYSO sol–gel polycrystal films: potential application as scintillator panel for X-ray imaging

Ricci¹,

Carbonaro²,

Casu³

et al. 2011

J. Mater. Chem.

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“…2b [13] For the function given by [13], the relation [10] causes a decrease in C and an additional decrease in ligand ' , energy shift, E ' , the electron lattice relaxation energy Z …”

Section: +mentioning

confidence: 99%

“…The energy of the 4f n-1 5d 1 electronic configuration of the Ln D+ ion in the lattice is diminished with respect to the free ion due to the interaction of the d electron with a host, (6), (7), (8). For triply ionized Ln 3+ ions this energy is positive and yields effective luminescence related to 4f n-1 5d 1 o 4f n transitions specifically in the case of Ce 3+ and Pr 3+ that have found applications in scitillators, (9), (10), (11), (12) and lasers, (13 , Sm 3+ and Dy 3+ coped to YAG, (17), (18).…”

Section: Introductionmentioning

confidence: 99%

High Pressure Study of Localized States Related to Lanthanide Ions in Solids

Grinberg

2009

ECS Trans.

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The latest results on high pressure investigations of luminescence related to Pr 3+ and Eu 2+ in different lattices are presented in this contribution. In the latter case the influence of pressure on anomalous luminescence in Ba x Sr 1-x F 2 for x=0, 0.3 and 0.5 and 1, and the LiBaF 3 :Eu 2+ system as a function of pressure are presented and discussed. A theoretical model describing an impurity trapped exciton as a system where the first carrier is localized at the impurity and the second one is captured by the Coulomb potential at Rydberg-like states is developed. The model is used to analyze the anomalous luminescence in Eu 2+ doped fluorides and pressure quenching of Pr 3+ luminescence in oxides. The model explains the differences in the formation of an impurity trapped exciton in dependence, if the first excited impurity state belongs to 4f n or 4f n-1 5d 1 electronic configurations.

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“…Recent increase in the interest in this field is stimulated by the search for new laser materials operating in the UV, scintillators and efficient phosphors that are able to convert the VUV emission of noble gases into the visible luminescence. An impressive number of the published works related to the optical spectra, excitation and relaxation processes and energy transfer involving transitions between high energy states within the 4f configuration and interconfigurational 4f-5d transitions of rare earth ions has appeared during the last decade (Wegh and Meijerink, 1996;Krupa and Queffelec, 1997;Wegh et al, 1997;Rodnyi et al, 2000;Makhov et al, 2000;Dorenbos, 2000;Karimov et al, 2001;Guyot et al, 2002;Wojtowicz et al, 2006). As a consequence, the phenomena mentioned above are rather well understood now.…”

Section: Introductionmentioning

confidence: 99%

Luminescence and excitation energy transfer in new fluoride crystals containing rare earth ions

Ryba‐Romanowski

Solarz

Gusowski

et al. 2007

Radiation Measurements

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Spectroscopic characteristics of Pr 3+ and Eu 3+ in K 2 Na 2 GdF 7 , K 5 Li 2 GdF 10 and K 3 GdF 6 fluoride matrices are considered. Crystal structures of these compounds have been ascertained based on X-ray measurement on single crystal samples. Energies of lattice vibrations have been derived from IR and Raman spectra. Spectroscopic features of crystals in the VUV region were studied using experimental facilities of the Superlumi station at HASYLAB in Hamburg. High-resolution spectra and decay curves of luminescence in the visible were used to determine the energy levels and excited state relaxation dynamics of luminescent ions. Relevance of energy transfer processes, which feed the 5 D J levels of Eu 3+ and the 3 P 0 level of Pr 3+ , is discussed.

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Scintillation properties of selected oxide monocrystals activated with Ce and Pr

Cited by 81 publications

References 11 publications

Optical and structural characterization of cerium doped LYSO sol–gel polycrystal films: potential application as scintillator panel for X-ray imaging

Optical and structural characterization of cerium doped LYSO sol–gel polycrystal films: potential application as scintillator panel for X-ray imaging

High Pressure Study of Localized States Related to Lanthanide Ions in Solids

Luminescence and excitation energy transfer in new fluoride crystals containing rare earth ions

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