Kanemitsu, Y. Tokushima University
Chernyak, D. The University of South Dakota
Ejiri, Hiroyasu Osaka University
Fushimi, Ken-Ichi Tokushima University Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Hata, K. Tokushima University
Hazama, Ryuta Osaka Sangyo University
Ikeda, H. Tohoku University
Imagawa, K. I.S.C. Lab.
Inoue, K. Tohoku University
Kozlov, A. The University of Tokyo
Orito, Reiko Tokushima University Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Shima, T. Osaka University
Takemoto, Y. University of Tokyo
Umehara, S. Osaka University
Yasuda, K. I.S.C. Lab.
Yoshida, S. Osaka University
Direct search for dark matter is one of the most important problems in astrophysics. Significant signal for dark matter will be a hint to clarify the origin of the universe. Only DAMA/LIBRA experiment with NaI(Tl) detector has ever suggested the presence of dark matter signal. Verifying the DAMA/LIBRA result by a NaI(Tl) detector is urgent and important task. We have tried to purify NaI(Tl) crystal to search for dark matter. In this presentation, the present status of purification will be discussed. The concentration of potassium is successfully reduced to desired sensitivity. The 210Pb, which is difficult to reduce, has been reduced effectively. Present status of low background measurement in Kamioka observatory will be shown.
Journal of Physics: Conference Series
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Science and Technology