1. Department of Chemistry, Faculty of Engineering, Gunma University, 1-5-1 Tenjin, Kiryu, Gunma 376-8515, Japan, Department of Material Development, Takasaki Radiation Chemistry Research Establishment, Japan Atomic Energy Research Institute, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan, Department of Nuclear Engineering and Management, Faculty of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 Japan, Department of Applied Chemistry, Saitama Institute of Technology, 1690...