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

• Published in: Radiation measurements Vol. 140; p. 106467
• Main Authors: Ivannikov, A.I., Khailov, A.M., Orlenko, S.P., Stepanenko, V.F., Trompier, F., Zhumadilov, K. Sh
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.01.2021
• Subjects: Alanine dosimeter; EPR dosimetry; Ionizing radiation; Paramagnetic centers; Spectra decomposition; Ionizing radiation; EPR dosimetry; Paramagnetic centers; Alanine dosimeter; Spectra decomposition
• ISSN: 1350-4487; 1879-0925
• DOI: 10.1016/j.radmeas.2020.106467

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 gamma- and alpha-irradiated alanine. The observed effect can be used for discrimination of the contribution of alpha- and 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. •Different ratio of the EPR spectral components was observed for the alanine irradiated by alpha and gamma rays.•These components correspond to different types of radiation induced stable radicals.•Relative contribution of low and high LET ionizing radiation may be determined based on the ratio of these components.