Measurements of Helium cross-sections for Helium-ion therapy

There is increasing interest in using helium ions for radiotherapy, complementary to protons and carbon ions. First patients have been already treated. A large number of patients were treated with 4He ions in the US heavy-ion-therapy project, and novel 4He-ion treatment programs are under preparation, for instance in Germany and Japan. Therefore, a better knowledge of 4He nuclear reaction and production cross-sections is required [1,2].