Crystal Growth and Optimization of Cs2LiLaBr6Scintillator via the Cs2LaBr5-LiBr Phase Diagram Construction

Xianggang Zhang, Zhuochen Cai, Zhe Kang, Huiwen Zhai, Ziang Yin, Wanqi Jie, Tao Wang

科研成果: 期刊稿件文章同行评审

8 引用 (Scopus)

摘要

Gamma/neutron dual detection has occupied significant territory in the field of homeland security and nuclear energy development. Cs2LiLaBr6 (CLLB) has shown both neutron/gamma dual-mode detection capability and excellent scintillation properties. Herein, we explored the Cs2LaBr5-LiBr phase diagram through powder X-ray diffraction (XRD) and differential scanning calorimetry (DSC) tests of synthesized polycrystalline materials. The Cs2LaBr5-rich side of the phase diagram is similar to a binary peritectic phase diagram, where the peritectic line (447 °C) extends to a LiBr content of 61%. The LiBr-rich side of the phase diagram resembles a binary eutectic phase diagram, where the eutectic point (395 °C) is located at 80% LiBr concentration. Guided by the phase diagram, CLLB ingots were designed to grow from the LiBr-rich side with different concentrations of LiBr. The scintillator properties of CLLB crystals were found to be deteriorated by the increasing defects with elevated LiBr contents. A concentration of LiBr around 55% was a preference for the growth of high-quality CLLB. A better understanding of the Cs2LaBr5-LiBr phase diagram benefits the growth of CLLB crystals and provides considerations for other halide double perovskites.

源语言英语
页(从-至)56-60
页数5
期刊IEEE Transactions on Nuclear Science
69
1
DOI
出版状态已出版 - 1 1月 2022

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