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Luminescence properties of the Mg co–doped Ce:SrHfO3 ceramics prepared by the Spark Plasma Sintering Method.

Authors :
Chiba, Hiroyuki
Kurosawa, Shunsuke
Harata, Koichi
Murakami, Rikito
Yamaji, Akihiro
Ohashi, Yuji
Pejchal, Jan
Kamada, Kei
Yokota, Yuui
Yoshikawa, Akira
Source :
Radiation Measurements. Jul2016, Vol. 90, p287-291. 5p.
Publication Year :
2016

Abstract

1300 or 1400 °C pre–sintered Al/Ce/Mg:SrHfO 3 and Al/Ce:SrHfO 3 ceramics were prepared by the Spark Plasma Sintering (SPS) in order to search for a new scintillation material with a high–effective atomic number(Z eff ) and good light output. The SrHfO 3 has a high Z eff of 60, and high gamma–ray detection efficiency is expected. Meanwhile it has a high melting point of over 2500 °C, and single crystal is hard to be grown. On the other hand, high melting materials can be prepared as ceramics, and the SPS method is a simple process to fabricate the ceramics within a few hours. Thus, we prepared the samples using the SPS method, and their optical and scintillation properties were investigated. We found that Al/Ce/Mg:SrHfO 3 and Al/Ce:SrHfO 3 ceramics had an emission wavelength at around 400 nm originating from 5d–4f transition of Ce 3+ . Moreover, Al/Ce/Mg:SrHfO 3 pre-sintered at a temperature of 1400 °C had a light output of approximately 5,000 ph/MeV. In this paper, the light output of Mg-co-doped samples was improved compared with the Mg-free ones. The light output also depends on the pre-sintering temperature. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
13504487
Volume :
90
Database :
Academic Search Index
Journal :
Radiation Measurements
Publication Type :
Academic Journal
Accession number :
115846713
Full Text :
https://doi.org/10.1016/j.radmeas.2016.02.025