Detectors For Direct Darkmatter Search At Kamland

A. Kozlov,D. Chernyak, Y. Takemoto,K. Fushimi,K. Imagawa,K. Yasuda,H. Ejiri,R. Hazama, H. Ikeda,K. Inoue,S. Yoshida, R.A. Etezov,Yu. M. Gavrilyuk,V.V. Kazalov,V.V. Kuzminov,S.I. Panasenko

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT（2020）

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摘要

The current status of laboratory for Dark Matter search at the Kamioka mine and specialized facility for production of NaI(Tl) detectors is described. Techniques developed for purification and growth of ultra-low background NaI(Tl) crystals are reported. Achieved activity levels of the Pb-210,K-40,U-238,Th-232 isotopes in the latest NaI(Tl) Dark Matter detector prototypes and the DAMA/LIBRA detectors are compared.

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关键词

Dark matter, Deep underground site, NaI(Tl) crystals

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