[19p-W810-1~16] 2.2 Detection systems

[19p-W810-15] Growth and Scintillation Properties of 2inch diameter SrI₂(Eu) single crystal

Yasuhiro Shoji^1,3, Shunsuke Kurosawa², Yuui Yokota², Shoki Hayasaka³, Kazuhisa Nagato³, Kei Kamada^2,3, Akihiro Sakai⁴, Akio Ohta⁴, Yuka Yanagida⁴, Yuji Ohashi¹, Nobuhiro Takeuchi⁴, 〇Akira Yoshikawa^1,2,3 (1.IMR, Tohoku Univ., 2.NICHe, Tohoku Univ., 3.C&A Corp., 4.CHIYODA TECHNOL)

Keywords:Scintillator,Melt Growth,Single Crystal

A vertical Bridgman (VB) crystal growth process was established using modified micro-pulling-down (μ-PD) crystal growth system with a removable chamber that was developed for the growth hygroscopic halide single crystals because conventional μ-PD method does not allow growth of large bulk single crystals. SrI₂(Eu) crystals were grown from the melt of (Sr_0.98Eu_0.02)I₂ composition using carbon crucibles. 2 inch and crack-free SrI₂(Eu) bulk crystals were produced. The crystals had high transparency and did not contain any visible inclusions. The crystals were cut and polished in the glove box and then sealed in an aluminum container with an optical window.