| Affiliation: | 1. Kobe Tokiwa Junior College, Nagata, Kobe 653, Japan;2. Kobe Tokiwa Junior College, Nagata, Kobe 653, Japan;3. Department of Physics and Laboratory of Nuclear Studies, Osaka University, Toyonaka, Osaka 560, Japan;4. Department of Physics and Laboratory of Nuclear Studies, Osaka University, Toyonaka, Osaka 560, Japan;5. Department of Physics and Laboratory of Nuclear Studies, Osaka University, Toyonaka, Osaka 560, Japan;6. College of General Education, Tokushima University, Tokushima 770, Japan;7. Research Center for Nuclear Physics, Osaka University, Suita, Osaka 565, Japan;8. Research Center for Nuclear Physics, Osaka University, Suita, Osaka 565, Japan |
