Formation of different types of paramagnetic centers in the alanine dosimeters exposed to alpha and gamma radiation-Study by EPR spectroscopy

EPR spectra of alanine dosimeters irradiated by gamma-rays and by alpha- particles were measured at different microwave power. The spectra were decomposed into three components corresponding to different stable radiation-induced radicals. Different ratio of the components was obtained for gammaand alpha-irradiated alanine. The observed effect can be used for discrimination of the contribution of alphaand gamma-radiation in mixed radiation field. That may be useful for control of dose at phantom experiments with neutron boron capture therapy, performed in mixed neutron-gamma field in which alpha-particles are emitted through neutrons capture reaction with boron.

Automated summary

The EPR spectra of alanine dosimeters irradiated by gamma-rays and alpha-particles were analyzed to differentiate their contributions in a mixed radiation field, which may be useful for controlling dose in experiments involving neutron boron capture therapy. Different components were observed for gamma and alpha-irradiated alanine, allowing for discrimination in the mixed radiation field.