Growth and Scintillation Properties of Directionally Solidified Ce:LaBr<sub>3</sub>/AEBr<sub>2</sub> (AE = Mg, Ca, Sr, Ba) Eutectic System

oleh: Kyoung Jin Kim, Yuki Furuya, Kei Kamada, Rikito Murakami, Vladimir V. Kochurikhin, Masao Yoshino, Hiroyuki Chiba, Shunsuke Kurosawa, Akihiro Yamaji, Yasuhiro Shoji, Satoshi Toyoda, Hiroki Sato, Yuui Yokota, Yuji Ohashi, Akira Yoshikawa

Format: Article
Diterbitkan: MDPI AG 2020-07-01

Deskripsi

Ce-doped LaBr<sub>3</sub>/AEBr<sub>2</sub> (AE = Mg, Ca, Sr, Ba) eutectics were grown using the Bridgman–Stockbarger (BS) method in quartz ampoules. The eutectics (AE = Mg and Ca) showed optical transparency like optical fiber bundles. A grown Ce-doped LaBr<sub>3</sub>/MgBr<sub>2</sub> eutectic shows a 355 nm emission ascribed to Ce<sup>3+</sup> 4f-5d transition under X-ray excitation. The smaller the ionic size of AE, the higher the light yield of the sample was. The light yield of Ce:LaBr<sub>3</sub>/MgBr<sub>2</sub> was 34,300 photon/MeV, which is higher than Ce:LYSO standard. Scintillation decay time under 662 keV gamma-ray excitation was 18.8 ns.