Share Email Print
cover

Proceedings Paper

Properties of transparent (Gd,Lu)3(Al,Ga)5O12:Ce ceramic with Mg, Ca and Ce co-dopants
Author(s): Yimin Wang; Gary Baldoni; Charles Brecher; William H. Rhodes; Urmila Shirwadkar; Jarek Glodo; Ishaan Shah; Chuncheng Ji
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Cerium activated mixed lutetium/gadolinium- and aluminum/gallium-based garnets have great potential as host scintillators for medical imaging applications. (Gd,Lu)3(Al,Ga)5O12:Ce and denoted as GLuGAG feature high effective atomic number and good light yield, which make it particularly attractive for Positron Emission Tomography (PET) and other γ-ray detection applications. For PET application, rapid decay and good timing resolution are extremely important. Most Ce-doped mixed garnet materials such as GLuGAG:Ce, have their main decay component at around 80 ns. However, it has been reported that the decays of some single crystal scintillators (e.g., LSO and GGAG) can be effectively accelerated by codoping with selected additives such as Ca, Mg and B. In this study, transparent polycrystalline (Gd,Lu)3(Al,Ga)5O12:Ce ceramics codoped with Ca or Mg or additional Ce, were fabricated by the sinter-HIP approach. It was found the transmission of the ceramics are closely related to the microstructure of the ceramics. As the co-dopant levels increase, 2nd phase occurs in the ceramic and thus transparency of the ceramic decreases. Ca and Mg co-doping in GLuGAG:Ce ceramic effectively accelerate decays of GLuGAG:Ce ceramics at a cost of light output. However, additional Ce doping in the GLuGAG:Ce has no benefit on improving decay time but, on the other hand, reduces transmission, light output. The mechanism under the different scintillation behaviors with Mg, Ca and Ce dopants are discussed. The results suggest that decay time of GLuGAG:Ce ceramics can be effectively tailored by co-doping GLuGAG:Ce ceramic with Mg and Ca for applications with optimal timing resolution.

Paper Details

Date Published: 27 August 2015
PDF: 8 pages
Proc. SPIE 9594, Medical Applications of Radiation Detectors V, 95940C (27 August 2015); doi: 10.1117/12.2187123
Show Author Affiliations
Yimin Wang, Radiation Monitoring Devices, Inc. (United States)
Gary Baldoni, Radiation Monitoring Devices, Inc. (United States)
Charles Brecher, Radiation Monitoring Devices, Inc. (United States)
William H. Rhodes, Radiation Monitoring Devices, Inc. (United States)
Urmila Shirwadkar, Radiation Monitoring Devices, Inc. (United States)
Jarek Glodo, Radiation Monitoring Devices, Inc. (United States)
Ishaan Shah, Radiation Monitoring Devices, Inc. (United States)
Chuncheng Ji, Radiation Monitoring Devices, Inc. (United States)


Published in SPIE Proceedings Vol. 9594:
Medical Applications of Radiation Detectors V
H. Bradford Barber; Lars R. Furenlid; Hans N. Roehrig, Editor(s)

© SPIE. Terms of Use
Back to Top