Depth dose distributions in a water phantom and total tissue dose rates were measured for neutron beams from a 30-inch isochronous cyclotron producing 8 MeV deuterons, 15 MeV protons, or 23.2 MeV helium-3 ions using various targets. The reactions employed were 9Be(3He,n), 9Be(p,n), 9Be(d,n), 2H(p,np), and 7Li(d,n). The influence of target construction on beam characteristics was examined. At various phantom depths, gamma-ray contamination and fast and thermal neutron fluxes were measured. The authors conclude that a small medical cyclotron is a satisfactory source of fast neutrons for radiobiological and dosimetric research and has possible clinical study applications.
No takes yet. Share an insight, caveat, or question.
Pinkerton et al. (1970) studied this question.