Studies of Thick Target Fast Neutron Production and Proton Activation of the Stable Isotope Tracer Calcium -48 as Applications of Nuclear Physics in Medicine.
The production of fast neutron beams for radiotherapeutic and proton activation of Ca-48 for use as a stable isotope tracer are examined. The properties of fast neutron beams produced by 26 MeV protons, 17.3 MeV deuterons and 41 MeV He-3 ions incident on targets of beryllium, deuterium gas, and lithium deuteride are examined. A high pressure, high current deuterium gas target was designed and built. Measurements were taken using neutron time-of-flight, Bonner spectrometer, ionization chamber and small volume spherical proportional counter techniques. Beam-target combinations are compared as to total yield, neutron energy, dose rate and microdosimetric properties. It is shown that a deuterium beam incident on a deuterium gas target is the best method for producing fast neutrons for radiotherapy.
- Pub Date:
- Physics: Nuclear;
- Calcium Isotopes;
- Fast Neutrons;
- Medical Science;
- Beams (Radiation);
- Nuclear Physics;
- Particle Production;
- Time Of Flight Spectrometers;
- Nuclear and High-Energy Physics