Abstract
In this research a computational feasibility study has been done on the use of 124SbBe photo-neutron source for Boron Neutron Capture Therapy (BNCT) using MCNPX Monte Carlo code. For this purpose, a special beam shaping assembly has been designed to provide an appropriate epithermal neutron beam suitable for BNCT. The final result shows that using 150kCi of 124Sb, the epithermal neutron flux at the designed beam exit is 0.23×109 (n/cm2s). In-phantom dose analysis indicates that treatment time for a brain tumor is about 40min which is a reasonable time. This high activity 124Sb could be achieved using three 50kCi rods of 124Sb which can be produced in a research reactor. It is clear, that as this activity is several hundred times the activity of a typical cobalt radiotherapy source, issues related to handling, safety and security must be addressed.
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