2021 年 13 巻 2 号 p. 66-72
To design robots worked in a high radiation dose environment, we investigated numerically radiation species and fluence distribution generated by irradiation of electrons with kinetic energy of 0.9 MeV into an aluminum plate. Numerical simulation results showed that photon was generated by irradiating the electron beam into the target plate, and no neutrons and protons were generated by the interaction. The photons were reflected and absorbed in a water region. We obtained the numerical simulation result for the decrease of fluence in an air region and the result of the radiation fluence with the inverse-square law as a function of distance. Also the radiation reduction with the distance for an experimental result was reproduced by the numerical simulation.
