CTOF measurements and Monte Carlo analyses of neutron spectra for the backward direction from a lead target irradiated with 200 to 1000 MeV proton

摘要

A calorimetric-time-of-flight (CTOF) technique was used for real-time,high-precision measurement of neutron spectrum at an angle of 175 degrees fromthe initial proton beam direction, which hits a face plane of a cylindricallead target of 20 cm in diameter and 25 cm thick. A comparison was performedbetween the neutron spectra predicted by the MARS, RTS&T, MCNP6, and the MCNPX2.6.0 transport codes and that measured for 200, 400, 600, 800, and 1000 MeVprotons