Optical absorption, luminescence, and scintillation characteristics of Lu3 Al5 O12: Ce optical ceramics were measured and compared with an analogous high quality single crystal. Optical absorption of the former shows an additional light scattering loss due to nanovoids and/or refraction index inhomogeneities. Even though radioluminescence intensity of the optical ceramics prepared by a coprecipitation route exceeds that of single crystal, its scintillation light yield is lower due to the charge carrier retrapping in the process of energy transfer towards the Ce3+ emission centers. Retrapping processes are evidenced by thermoluminescence measurements below room temperature. Lu3 Al5 O12: Ce optical ceramics does not show the presence of the LuAl antisite defects which decreases the scintillation figure of merit in single crystals grown from the melt [M. Nikl, Phys. Status Solidi A 202, 201 (2005)]. Furthermore, using the ceramic technology, one can achieve both the homogeneous doping and higher Ce concentration. Similar to Y3 Al5 O12: Ce, the optical ceramics may therefore become competitive to the Lu3 Al5 O12: Ce single crystals, if trapping phenomena at other defects can be further reduced. © 2007 American Institute of Physics.
Nikl, M., Mares, J., Solovieva, N., Li, H., Liu, X., Huang, L., et al. (2007). Scintillation characteristics of Lu3Al5O12:Ce optical ceramics. JOURNAL OF APPLIED PHYSICS, 101, 33515 [10.1063/1.2433706].
|Citazione:||Nikl, M., Mares, J., Solovieva, N., Li, H., Liu, X., Huang, L., et al. (2007). Scintillation characteristics of Lu3Al5O12:Ce optical ceramics. JOURNAL OF APPLIED PHYSICS, 101, 33515 [10.1063/1.2433706].|
|Tipo:||Articolo in rivista - Articolo scientifico|
|Carattere della pubblicazione:||Scientifica|
|Titolo:||Scintillation characteristics of Lu3Al5O12:Ce optical ceramics|
|Autori:||Nikl, M; Mares, J; Solovieva, N; Li, H; Liu, X; Huang, L; Fontana, I; Fasoli, M; Vedda, A; Dambrosio, C|
|Data di pubblicazione:||2007|
|Rivista:||JOURNAL OF APPLIED PHYSICS|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1063/1.2433706|
|Appare nelle tipologie:||01 - Articolo su rivista|