Abstract
A three-dimensional verification method using dye gel dosimeters is studied for the external exposure in boron neutron capture therapy (BNCT). The characterization experiments of the dye gel dosimeters were performed for the dose response to gamma rays. As the dye gel dosimeters, leucomalite-green, leucocrystal-violet and genipin gels, which have different coloration characteristics, were selected. The results for the dose response to gamma rays showed linearity up to 100 Gy. However, it was found that the correction for auto-oxidation and dose rate dependency were necessary.
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