1. Laboratory of Alpha-ray Emitters, Institute for Materials Research, Tohoku University
2. Institute for Integrated Radiation and Nuclear Science, Kyoto University
3. Research Center for Electron Photon Science, Tohoku University
4. Radioisotope Research Center, Institute for Radiation Sciences, Osaka University
5. Department of Chemistry, Graduate School of Science, Osaka University
6. Advanced Clinical Research Center, Fukushima Medical University
7. Division of Science, Institute for Radiation Sciences, Osaka University