JAEA-Conf 2011-002 - 日本原子力研究開発機構

We described our formalism for calculating damage to materials and implementation into PHITS
of the DPA evaluation. DPAs are calculated using Coulomb scattering by the target PKA’s created by the
projectile and the secondary from nuclear reactions. We compared PHITS results for the 130 MeV/u 76 Ge
and proton into W reactions with calculated results of TRIM, which is widely used and cannot treat nuclear
reactions. PHITS gives good agreements with TRIM results for DPA values by PKA’s directly created by
the projectile such as 76 Ge and proton. For the proton incident reaction, PKA’s created by the secondary
particles is more dominant than PKA’s by the projectile in DPA calculations. TRIM may lead to sever
underestimation where projectile energy is high enough to create nuclear reactions. Therefore, PHITS is
more powerful code than TRIM for the damage calculations especially in the high-energy accelerator
facilities.
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JAEA-Conf 2011-002