PICOLON dark matter search ∼ Development of highly redio-pure NaI(Tl) scintilltor

Ken Ichi Fushimi, Dmitry Chernyak, Hiroyasu Ejiri, Kazumi Hata, Ryuta Hazama, Shoko Hirata, Takashi Iida, Haruo Ikeda, Kunio Inoue, Kyoshiro Imagawa, Yuta Kanemitsu, Alexandle Kozlov, Reiko Orito, Tatsushi Shima, Yasuhiro Takemoto, Saori Umehara, Sei Yoshida

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2 Citations (Scopus)


The PICOLON project is developing a high purity NaI(Tl) crystal by optimizing the purification methods. The reduction method for 40K was established and we got sufficiently pure NaI(Tl) crystal for 40K. On the other hand, the concentration of 210Pb is still higher than our goal. The investigation is now in progress to fix the origin of the contamination. The construction of the second phase detector system of PICOLON detector will be started in 2020 spring. The total mass of the second phase is about 54 kg. The background level by the test measurement using a single module is reported.

Original languageEnglish
Article number012057
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2020 Mar 20
Event16th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2019 - Toyama, Japan
Duration: 2019 Sept 92019 Sept 13


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