High Energy Neutron Measurements and Monitoring for a 230 MeV Proton Radiotherapy Facility

V. Nazaryan & C. Keppel
Background: Primary shielding walls in modern proton therapy facilities are typically made of an over 7' thick of ordinary (2.3 g/cm3) concrete. Our analysis demonstrate that behind such a thick wall in forward direction with respect to the proton beam neutrons with energies greater than 8[for full text, please go to the a.m. URL]