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

¹ Department of Physics, Tokushima University, 2-1 Minami Josanjimacho Tokushima city, Tokushima 770-8506, JAPAN.

² Department of Physics, The University of South Dakota, Vermillion, South Dakota 57069, USA.

³ Research Center for Nuclear Physics, Osaka University, 10-1 Mihogaoka Ibaraki city, Osaka 567-0047, JAPAN.

⁴ Graduate school of Integrated Arts and Sciences, Tokushima University, 1-1 Minami Josanjimacho Tokushima city, Tokushima 770-8502, JAPAN.

⁵ Department of Environmental Science and Technology, Osaka Sangyo University, 3-1-1 Nakagaito Daito city, Osaka 574-8530, JAPAN.

⁶ Center for Integrated Research in Fundamental Science and Engineering (CiRfSE), Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan

⁷ Research Center for Neutrino Science, Tohoku University, 6-3 Aramaki Aza Aoba Aoba ward Sendai city, Miyagi 980-8578, JAPAN.

⁸ I.S.C. Lab., 7-7-20 Saito Asagi Ibaraki City, Osaka 567-0085, JAPAN.

⁹ Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study, The University of Tokyo, 5-1-5 Kashiwanoha Kashiwa city, Chiba 277-8583, JAPAN.

¹⁰ Institute for Cosmic Ray Research, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa city, Chiba, 277-8582, JAPAN

¹¹ Department of Physics, Osaka University, 1-1 Machikaneyamacho Toyonaka city, Osaka 560-0043, JAPAN