The CTOF measurements and Monte Carlo analyses of neutron spectra for backward direction from iron target irradiated by protons with energies from 400 to 1200 MeV

摘要

A calorimetric-time-of-flight (CTOF) technique was used for real-time,high-precision measurement of neutron spectrum at the angle of 175 degrees fromthe initial proton beam direction, which hits a face plane of a cylindricaliron target of 20 cm in diameter and 25 cm thick. A comparison was performedbetween the neutron spectra predicted by the MARS and the MCNPX code systemsand measured by experiments for 0.4-, 0.6-, 0.8-, 1.0-, and 1.2-GeV protons.