Search for cosmic dark matter by means of ultra high purity NaI(Tl) scintillator

Ken Ichi Fushimi, Dmitry Chernyak, Hiroyasu Ejiri, Ryuta Hazama, Shoko Hirata, Haruo Ikeda, Kunio Inoue, Kyoshiro Imagawa, Gakuji Kanzaki, Alexandre Kozlov, Reiko Orito, Tatsushi Shima, Yasuhiro Takemoto, Yuri Teraoka, Saori Umehara, Sei Yoshida

Research output: Contribution to journalArticlepeer-review

Abstract

The dark matter search project by means of ultra high purity NaI(Tl) scintillator is now underdevelopment. An array of large volume NaI(Tl) detectors whose volume is 12.7 cmφ×12.7 cm is applied to search for dark matter signal. To remove radioactive impurities in NaI(Tl) crystal is one of the most important task to find small number of dark matter signals. We have developed high purity NaI(Tl) crystal which contains small amounts of radioactive impurities, < 4 ppb ofnatK, 0.3 ppt of Th chain, 58 µBq/kg of226Ra and 30 µBq/kg of210Pb. Future prospects to search for dark matter by means of a large volume and high purity NaI(Tl) scintillator is discussed.

Original languageEnglish
JournalUnknown Journal
Publication statusPublished - 2017 Apr 28

ASJC Scopus subject areas

  • General

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