1. Single Cell Radiation Biology Team, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inageku, Chiba 263-8555, Japan
2. Radiation Effect Research Group, Department of Accelerator and Medical Physics, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inageku, Chiba 263-8555, Japan
3. Department of Radiological Technology, Graduate School of Health Sciences, Hirosaki University, 66-1 Hon-cho, Hirosaki-shi, Aomori 036-8564, Japan
4. Department of Radiology, Chiba University Hospital, 1-8-1 Inohana, Chuo-ku, Chiba 260-8677, Japan
5. Graduate School of Science, Rikkyo (St. Paul’s) University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
6. Electrostatic Accelerator Operation Section, Department of Accelerator and Medical Physics, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inageku, Chiba 263-8555, Japan