9:15 AM - 9:30 AM
*Kazuhiko NINOMIYA1, Zijang ZHANG1, Yuji OSUMI1, Shizuka MATSUNAGA1, Shunsuke KAKITANI1, Yoshiaki YAMAGUHI2, Haruo TSURUTA3, Akira WATANABE4, Kazuyuki KITA5, Atsushi SHINOHARA1 (1.Graduate School of Science, Osaka University, 2.Osaka University Radioisotope Research Center, 3.Atomosphere and Ocean Research Institute, University of Tokyo, 4.Fukushima University, 5.Ibaraki University)