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

TL;DR

This study employs the CTOF technique to measure neutron spectra at a backward angle from an iron target irradiated by protons of 400-1200 MeV, comparing experimental results with Monte Carlo simulations to evaluate model accuracy.

Contribution

It provides high-precision neutron spectrum measurements at 175 degrees and compares these with predictions from MARS and MCNPX codes for various proton energies.

Findings

Measured neutron spectra with CTOF technique.

Compared experimental data with MARS and MCNPX simulations.

Validated the accuracy of simulation models at different energies.

Abstract

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