Abstracts 2006

Abstract of Publication No. 550

Journal Cover Picture (PDF) K. W. Krämer, P. Dorenbos, H. U. Güdel and C. W. E. van Eijk
Development and characterization of highly efficient new cerium doped rare earth halide scintillator materials
J. Mater. Chem. 16, 2773-2780 (2006)      Full Text (PDF)      DOI-Link      Journal Cover Picture      Journal Cover Picture (PDF)      DOI-Link     

Abstract: Inorganic scintillators for g-ray detection are used in many fields from medical-diagnostic imaging to industrial measuring systems. Accordingly they face various demands with respect to e.g. response time, light yield, and energy resolution. The development of the new family of rare-earth halide scintillators LaCl3:Ce3+, LaBr3:Ce3+, and LuI3:Ce3+ is reviewed and their properties are compared to those of the established materials NaI:Tl+ and Lu2SiO5:Ce3+. Extraordinary properties such as the short lifetime of 15 ns and the narrow energy resolution of 2.6% in LaBr3:5%Ce3+, or the high light yield of 95000 photons per MeV in LuI3:5%Ce3+ improve the performance of scintillators in existing applications and open the way to novel ones. The development of these new materials was empowered by the close interdisciplinary collaboration between scientists in the fields of inorganic chemistry, optical spectroscopy, and applied physics.

Cover Picture: The picture shows the raw data from a positron emission tomography module with 6027 LaBr3:Ce3+ crystals irradiated by 511 keV annihilation quanta (courtesy University of Pennsylvania and Philips Medical Systems PET Systems, Cleveland).

Last modified: 13.12.11 by Gabriela Frei