Effect of Mg²⁺ ions co-doping on timing performance and radiation tolerance of Cerium doped Gd₃Al₂Ga₃O₁₂ crystals

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• 作者：M.T. Lucchini^a ; ^{Marco.Toliman.Lucchini@cern.ch" class="auth_mail" title="E-mail the corresponding author} ; V. Babin^c ; P. Bohacek^c ; S. Gundacker^a ; K. Kamada^d ; ^f ; M. Nikl^c ; A. Petrosyan^b ; A. Yoshikawa^d ; ^e ; ^f ; E. Auffray^a
• 关键词：Inorganic scintillators ; Medical imaging ; Calorimeters ; Time-of-flight ; Radiation tolerance
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2016
• 出版时间：21 April 2016
• 年：2016
• 卷：816
• 期：Complete
• 页码：176-183
• 全文大小：1288 K

文摘

Inorganic scintillators with high density and high light yield are of major interest for applications in medical imaging and high energy physics detectors. In this work, the optical and scintillation properties of Mg co-doped Ce:Gd₃Al₂Ga₃O₁₂ crystals, grown using Czochralski technique, have been investigated and compared with Ce:Gd₃Al₂Ga₃O₁₂ ones prepared with identical technology. Improvements in the timing performance of the Mg co-doped samples with respect to Ce:Gd₃Al₂Ga₃O₁₂ ones have been measured, namely a substantial shortening of the rise time and scintillation decay components and lower afterglow were achieved. In particular, a significantly better coincidence time resolution of 233 ps FWHM, being a fundamental parameter for TOF-PET devices, has been observed in Mg co-doped crystals. The samples have also shown a good radiation tolerance under high doses of γ-rays, making them suitable candidates for applications in harsh radiation environments, such as detectors at future collider experiments.