Characterization of Neutron Flux in a Medical Cyclotron for Research Purposes using Gold foils and GATE8.1

The aim of this study is to characterize the neutron flux generated directly behind targets used in medical cyclotrons. The characterization process aims at determining the feasibility of using the generated neutrons for research purposes in Neutron Activation Analysis (NAA). The study was performed by activating gold foils placed directly behind the cyclotron targets. The thermal neutron flux was measured at 1.5E+06 ± 5.94E+04 (neutrons. cm -2 . sec -1 ). The flux value is the same order of magnitude listed in the manual produced by the cyclotron manufacturer. The results are encouraging and show a high potential for using the cyclotron facility as a thermal column for research purposes. However, it is important radiation protection procedures be followed to ensure the safety of researchers due to the high dose rate measured directly behind the target at 2.46 Sv/ h using an optically stimulated luminescence (OSL) chip during the beam on time.

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