[19p-A306-1~16] 2.1 Detection Devices

1:45 PM - 2:00 PM JST(4:45 AM - 5:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[19p-A306-4] Crystal Growth and Luminescence Properties of Cs₃(Li, Cu)₂I₅ Scintillators for Cosmic Dark Matter Search

〇(D)Yusuke Urano^1,2, Shunsuke Kurosawa^2,3,4, Akihiro Yamaji^2,3, Akira Yoshikawa^2,5, Kenichi Fushimi⁶, Reiko Orito⁶ (1.Department of Mat. Sci., Graduate School of Eng., Tohoku Univ., 2.IMR, Tohoku Univ., 3.NICHe, Tohoku Univ., 4.Institute for Laser Eng., Osaka Univ., 5.C&A Corporation, 6.Faculty of Science and Technology, Tokushima Univ.)

Keywords:

Dark Matter,Halide Scintillator,Scintillation Detector

The scintillator materials used in direct dark matter (DM) search must have high light output and chemical stability. Cs₃Cu₂I₅ (CCI) crystals were reported to have high light output (> 40,000 photons/MeV), chemically stability and low hygroscopicity. We focused on CCI crystal as a scintillator material for DM search. Although the mass of DM is unidentified, doping Cs₃Cu₂I₅ with Li is expected to improve sensitivity to the DM with various masses of Li, Cs, Cu, and I. Thus, Cs₃(Li, Cu)₂I₅ (CCIL) crystals were grown by the Bridgman-Stockbarger method. In this presentation, we report on the crystal growth of CCIL, its luminescence and scintillation properties.