International Topical Meeting on Nuclear Research Applications and Utilization of Accelerators
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AP/IE-08
Simulation of Light Ion Collisions from Intra Nuclear Cascade (INCL-Fermi Breakup) Relevant for Medical Irradiations and Radioprotection A.B. Boudard1, J. Cugnon2, S. Leray3, and P. Kaitaniemi3 1CEA-Saclay SPhN, Gif-sur-Yvette, France Corresponding Author: Alain.Boudard@cea.fr An increasing interest is now well established for the treatment of tumors by irradiations with light ion beams (especially Carbon) of a few 100 MeV per nucleons. Similar problems occur at higher energy for the radio-protection of manned spacecraft irradiated by cosmic rays of protons and heavy ions with a wide energy spectra around 1 GeV per nucleon. A good modelization starts at the nuclear level with codes able to predict the double differential cross sections of the various outgoing channels for a variety of targets and beam nature and energy. Light ions (He, C, O, Ca) are especially important in this context. The intranuclear cascade code INCL4 has obtained many successes in the frame work of spallation physics, especially for the detailed production of neutrons and of residual nuclei but for rather heavy targets (above aluminium) and with protons or α projectiles. However, it should be noted that α beams were a lot less tested. We have recently extended the possibilities of INCL4 to light ion induced reactions by adding a more precise treatment of the spectator nucleons from composite projectiles (α now up to C or O) and coupling it to a Fermi break-up model. This Fermi break-up (standard) is used dynamically for the projectile spectators and for the remnant nuclei produced after the cascade. Calculations with thick targets (including a transport of particles) are also possible with this version also introduced as a physics model in GEANT4. We will present the model and encouraging test calculations on n production, fragmentation of the projectile and residual nuclei production for light projectiles, various targets especially light ones (C to Al) at various energies (90A MeV to 400A MeV).
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