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La2Hf2O7:Ti4+ ceramic scintillator for x-ray imaging

Published online by Cambridge University Press:  01 March 2005

Yaming Ji ,
Danyu Jiang  and
Jianlin Shi
Yaming Ji
Affiliation:
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
Danyu Jiang
Affiliation:
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
Jianlin Shi*
Affiliation:
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
*
a) Address all correspondence to this author. e-mail: jlshi@shcnc.summ.shchc.ac.cn
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Abstract

Transparent ceramic scintillators of La2Hf2O7:Ti4+ were developed by a novel combustion synthesis method. The optical transmittance for a 1.0-mm-thick specimen is about 60% of the incident light, and the x-ray stopping power is also quiet high. The broad emission band centered at 475 nm originates from the oxide-Ti4+ charge-transfer transitions, which renders fast decay time on the order of 10 μs. The highest relative light output has reached about 1.5 times that of Bi4Ge3O12 (BGO) single crystal when excited by 120 kV x-rays.

Keywords

Combustion synthesisLuminescencePolycrystal
Type
Rapid Communications
Information
Journal of Materials Research , Volume 20 , Issue 3 , March 2005 , pp. 567 - 570
Copyright
Copyright © Materials Research Society 2005

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