Luminescence properties of the Mg co–doped Ce:SrHfO3 ceramics prepared by the Spark Plasma Sintering Method. (July 2016)

• Record Type: Journal Article
• Authors: Chiba, Hiroyuki; Kurosawa, Shunsuke; Harata, Koichi; Murakami, Rikito; Yamaji, Akihiro; Ohashi, Yuji; Pejchal, Jan; Kamada, Kei; Yokota, Yuui; Yoshikawa, Akira
• Is Part Of: Radiation measurements. Volume 90(2016:Jul.)
• Page Start: 287
• Page End: 291
• Publication Date: 2016-07
• Subjects: Ceramics scintillator -- High effective atomic number material; Nuclear emulsions -- Periodicals; Particle tracks (Nuclear physics) -- Periodicals; Thermoluminescence -- Periodicals; Cosmic rays -- Periodicals; Radiation -- Measurement -- Periodicals; Radiometry -- Periodicals; Radiation Monitoring -- Periodicals; Émulsions nucléaires -- Périodiques; Particules (Physique nucléaire) -- Traces -- Périodiques; Thermoluminescence -- Périodiques; Rayonnement cosmique -- Périodiques; Radiométrie -- Périodiques; 539.77
• DOI: 10.1016/j.radmeas.2016.02.025
• Languages: English
• ISSNs: 1350-4487

Abstract

Abstract: 1300 or 1400 °C pre–sintered Al/Ce/Mg:SrHfO3 and Al/Ce:SrHfO3 ceramics were prepared by the Spark Plasma Sintering (SPS) in order to search for a new scintillation material with a high–effective atomic number(Zeff ) and good light output. The SrHfO3 has a high Zeff 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:SrHfO3 and Al/Ce:SrHfO3 ceramics had an emission wavelength at around 400 nm originating from 5d–4f transition of Ce 3+ . Moreover, Al/Ce/Mg:SrHfO3 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. Highlights: Luminescence Properties of Al/Ce/Mg:SrHfO3 ceramics scintillator was investigated. These ceramics were prepared by the Spark Plasma Sintering Method. Light output of the Al/Ce/Mg:SrHfO3 ceramics was approximately 5, 000 ph/MeV.