Affiliation: | (1) Tokai Research Establishment, Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken 319-1195, Japan, JP;(2) Kansai Research Establishment, Japan Atomic Energy Research Institute, 8-1, Umemi-dai, Kizucho, Soraku-gun, Kyoto-hu 619-0215, Japan, JP |