Radial dose calculation due to the irradiation of a heavy ion; Role of composite electric field formed from the polarization of molecules and molecular ions

重イオン照射による動径線量計算; 分子の分極と分子イオンの合成電場の役割

森林 健悟

Moribayashi, Kengo

This paper discusses the role of composite electric field on radial doses through simulations due to the irradiation of a heavy ion. This composition electric field is formed from molecular ions, the polarization of molecules, and free electrons. Free electrons as well as these molecular ions are produced from the impact ionization of an incident ion or the other free electrons. This simulation model employs an isolated atom model that additionally may be able to treat the advantage of the free electron gas model. Some free electrons are trapped near the track of this incident ion and form plasma. The results obtained here show that this plasma plays a role of bringing about higher radial doses with increasing impact ionization cross sections of incident ions.