Affiliation: | (1) Japan Atomic Energy Agency, 8-1, Umemidai, Kizu-cho, Kyoto 619-0215, Japan;(2) Korea Atomic Energy Research Institute, P. O. Box 105, Deokjin-Dong, Yuseong-Gu, Daejeon, 305-600, Korea;(3) Department of Physics, Nara Women’s University, Nara 630-8506, Japan;(4) POSTECH, San 31, Hyoja-Dong, Namku, Pohang, Kyungbuk, 790-784, Korea |