Shielding Data for 400 MeV/u ¹²C Ions on Iron and Water Targets

In order to provide a special method for rapid calculation of shielding thickness or validation of results of Monte Carlo code simulation for medical heavy ion accelerator, FLUKA is employed to perform the calculation of shielding parameters for 400 MeV/u ¹²C ions on iron and water targets. Firstly, the angle distribution and main compositions of the secondary radiation are studied, and then the attenuation curves of the dose equivalent are given, and the radiation source term(H₀) and attenuation length(λ₀) are obtained by fitting the data. Finally, the shielding design of a treatment room of medical heavy ion accelerator in Putian is taken as an example to introduce the application of the shielding parameters. The comparison with the simulation results shows that the shielding parameters given in this paper are reliable. These parameters can provide reliable reference data for shielding design of similar medical heavy ion accelerators.