| Budget Amount *help |
¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
|
|---|
| Outline of Final Research Achievements |
In heavy ion radiotherapy, carbon ions are used to attack cancers in the patient's body. During carbon ions travel in the body, they can undergo nuclear reactions with elements of body. It is known that the most reaction products appear along the primary beam direction. Since there are concerns about long-term late effects due to low dose exposure, highly accurate prediction of dose is required, and it is necessary to measure double-differential cross-section (DDX) data and develop a theoretical model.
We developed the experimental equipment and measured DDXs. Experiments were carried out at the Heavy Ion Medical Accelerator In Chiba (HIMAC). The energy of emitted particles was measured with two types of crystal spectrometers. The notable point is that high-energy particles are observed at large angles. This fact suggests that the high-energy heavy-ions can have a long range over the beam diameter.
|
