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Real-time estimation of boron concentration using an improved gamma-ray telescope system for boron neutron capture
Yoshinori Sakurai1, Da Fu2, Takushi Takata1
1Institute for Integrated Radiation and Nuclear Science, Kyoto University, 2 Asashiro-nishi, Kumatori-cho, Sennan-gun, Osaka, 590-0494, Japan.
Abstract:
An online, real-time estimation method to determine the spatial distribution of boron-10 (B-10) concentrations is required for improved dose estimation in boron neutron capture therapy. By using a gamma-ray telescope technique to analyze the 478-keV prompt gamma rays generated from the nuclear reaction of B-10 with thermal neutrons, information regarding the B-10 concentration distribution can be obtained. The improved gamma-ray telescope system was settled at the Heavy Water Neutron Irradiation Facility of Kyoto University Reactor. Experimental verification of the improved telescope system was performed, and the experimental data were compared with the simulated data to calculate the specification coefficient that relates the design simulation to the actual measurement. From the experimental verification results, the effectiveness and usefulness of the improved gamma-ray telescope system were confirmed, and the specification coefficient was obtained.
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