1. Materials Sciences Research Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Ibaraki 319-1195, Japan
2. Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8654, Japan
3. Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo, 5-1-5 Kashiwa-no-Ha, Kashiwa, Chiba 277-8583, Japan
4. Institute for Radiation Sciences, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
5. Graduate School of Science, Tohoku University, 6-3, Aramaki Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
6. Institute for Integrated Radiation and Nuclear Science, Kyoto University, Kumatori, Osaka 590-0494, Japan
7. Muon Science Laboratory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 315-0801, Japan
8. Toyota Central Research & Development Laboratories, Inc., Yokomichi, Nagakute, Aichi 480-1192 Japan
9. Division of Natural Sciences, International Christian University, Mitaka, Tokyo 181-8585, Japan
10. Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka 560-0043, Japan
11. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo Sagamihara, Kanagawa 252-5210, Japan
12. Atomic, Molecular & Optical Physics Laboratory, RIKEN, 2-1, Hirosawa, Wako-shi, Saitama 351-0198, Japan
13. Conservation Science Laboratory, Graduate School of Fine Arts, Tokyo University of the Arts, 12-8 Uenokouen, Taitou-ku, Tokyo 110-8714, Japan
14. Radiation Science Center, Applied Research Laboratory, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan