Benchmark calculations of neutron yields and dose equivalent from thick iron target for 52-256 MeV protons

摘要

Neutron yields from thick iron target for 52, 113 and 256 MeV protons were calculated by MCNPX and NMTC/JAM, and compared with data measured by Nakamura et al. And Meier et al. [Nucl. Sci. Eng. 102 (1989) 310]. The MCNPX code reproduced the experimental total neutron yields well by a factor of two, except for 15 deg. at 52 MeV. The NMTC/JAM code also reproduced the experimental total neutron yields by a factor of two, except for 7.5 deg. at 113 MeV, and 52 MeV. Shielding calculations were done for ordinary concrete using the above experimental and calculated neutron spectra.