Measurements of Secondary Neutrons Produced from Thick Targets Bombarded by High Energy Neon Ions

摘要

Following our preceding study on thick target neutron yields by He and C, we measured angular and energy distributions of neutrons produced by 100, 180 and 400 meVucleon Ne ions stopping in thick carbon, aluminum, copper and lead targets using the heavy ion medical accelerator of the National Institute of Radiological Sciences. The neutron spectra in the forward direction have broad peaks which are located At about 60 to 70/100 of the incident particle energy per nucleon due to break-up process and spread up to Almost twice as much as the projectile energy per nucleon.