2-inch size crystal growth of Ce:Gd3Al2Ga3O12 with various Ce concentration and their scintillation properties

2 inch size CeO.2, 1%, 2.5% and 3% doped Gd3(Ga,Al)5O12 (GAGG) single crystals were grown by the Cz method. Luminescence and scintillation properties were measured. Light yield change along the growth direction and effects of Ce concentration on scintillation properties in Ce:GAGG were studied. Ce3+ 5d-4f emission within 520-530nm was observed in the Ce:GAGG crystals. The Ce1%:GAGG sample with 5×5×5mm size showed the highest light yield of 62000 photon/MeV. The energy resolution was 4.7%@662keV. With increasing solidification fraction, the L Y were decreased. It is proposed that the increase of Ga concentration along the growth direction is the main cause of the decrease of L Y. The scintillation decay times were accelerated with increasing Ce concentration in the Ce:GAGG crystals. The scintillation decay times were 92.0ns, 79.1ns and 68.3ns in the Ce1, 2 and 3% GAGG, respectively. CeO.2% sample showed scintillation decay time of 61.9ns (49%) with slower decay component of 595ns(51%).

[1]  Karel Nejezchleb,et al.  Scintillation response of Ce-doped or intrinsic scintillating crystals in the range up to 1MeV , 2004 .

[2]  M. Martini,et al.  Traps and Timing Characteristics of LuAG:Ce3+ Scintillator , 2000 .

[3]  Kan Yang,et al.  Effects of $\hbox {Ca}^{2+}$ Co-Doping on the Scintillation Properties of LSO:Ce , 2008, IEEE Transactions on Nuclear Science.

[4]  M. Nikl.  Scintillation detectors for x-rays , 2006 .

[5]  W. Moses,et al.  Effects of Ce Concentration in Scintillation Properties ofLaBr3:Ce , 2005 .

[6]  W. Moses,et al.  Effects of Ce concentration on scintillation properties of LaBr/sub 3/:Ce , 2004, IEEE Symposium Conference Record Nuclear Science 2004..

[7]  G. Kemmerling,et al.  Comparison of LuYAP, LSO and BGO as scintillators for high resolution PET detectors , 2002, 2002 IEEE Nuclear Science Symposium Conference Record.

[8]  Paul Lecoq,et al.  Development of scintillation materials for PET scanners , 2007 .

[9]  P. Lecoq,et al.  New inorganic scintillation materials development for medical imaging , 2001, 2001 IEEE Nuclear Science Symposium Conference Record (Cat. No.01CH37310).

[10]  C. Melcher,et al.  Cerium-doped lutetium oxyorthosilicate: a fast, efficient new scintillator , 1991, Conference Record of the 1991 IEEE Nuclear Science Symposium and Medical Imaging Conference.

[11]  K. Kamada,et al.  Composition Engineering in Cerium-Doped (Lu,Gd)3(Ga,Al)5O12 Single-Crystal Scintillators , 2011 .

[12]  T. Niedermayr,et al.  Scintillators With Potential to Supersede Lanthanum Bromide , 2009, IEEE Transactions on Nuclear Science.

[13]  M. Moszynski,et al.  Non-proportionality and thermoluminescence of LSO:Ce , 2005, IEEE Symposium Conference Record Nuclear Science 2004..

[14]  E. Auffray,et al.  LuAG:Ce fibers for high energy calorimetry , 2010 .

[15]  Kanai S. Shah,et al.  Labr3:Ce scintillators for gamma ray spectroscopy , 2002 .

[16]  Horst Halling,et al.  Comparison of LuYAP, LSO, and BGO as scintillators for high resolution PET detectors , 2002 .

[17]  K. Makishima,et al.  Improvement of ceramic YAG(Ce) scintillators to (YGd)3Al5O12(Ce) for gamma-ray detectors , 2007 .

[18]  D. Wolski,et al.  Properties of the new LuAP:Ce scintillator , 1997 .

[19]  C. Piemonte,et al.  Analog Circuit for Timing Measurements With Large Area SiPMs Coupled to LYSO Crystals , 2011, IEEE Transactions on Nuclear Science.

[20]  M. Moszynski,et al.  Properties of the YAG:Ce scintillator , 1994 .