[14p-2K-1~17] 15.1 Bulk crystal growth

[14p-2K-2] Effects of Lu Substituting effects of the CeBr₃ Scintillator Crystals

〇(M2)Tomoki Ito¹, Yuui Yokota², Shunsuke Kurosawa^1,2, Kei Kamada^2,3, Jan Pejchal^2,4, Yuji Ohashi¹, Akira Yoshikawa^1,2,3 (1.IMR Tohoku Univ., 2.NICHe Tohoku Univ., 3.C&A Corp., 4.Inst. Physics ASCR)

Keywords:Micro-dullung down method,Scintillator,Halide

Halide single crystals show relatively high light yield and energy resolution because of the small band-gap. CeBr₃ crystal has fast decay time of (~19 ns) in addition to the high light yield (~60,000 ph/MeV) and the CeBr₃ crystal is expected to be applied in radiation detectors with high timing resolution. In this research, we focus substituting effects of Lu to the CeBr₃ crystal in order to increase its density and effective atomic number. Lu substituted CeBr₃ crystals were grown by micro-pulling down method. The light yields of Lu5% and 10% substituted CeBr₃ were smaller than CeBr₃ crystal.