Y. Ishikawa
Institute of Applied Beam Science, Ibaraki University, Mito 310-8512, Japan. Institute of Material Structure Science, KEK Tokai, Shirakata 203-1, Naka 319-1106, Japan.
Japan

T. Sakuma
Institute of Applied Beam Science, Ibaraki University, Mito 310-8512, Japan.
Japan

T. Hashimoto
Institute of Applied Beam Science, Ibaraki University, Mito 310-8512, Japan.
Japan

Xianglian Xianglian
College of Physics and Electronics Information, Inner Mongolia University for the Nationalities, Tongliao 028043, China.
China

O. Kamishima
Institute for Fundamental Sciences, Faculty of Science and Engineering, Setsunan University, Neyagawa 572-8508, Japan.
Japan

S.A. Danilkin
Bragg Institute, Australian Nuclear Science and Technology Organization, Kirrawee DC NSW 2232, Australia.
Australia