Standard commercial L-alanine pellets and specially prepared natural lithium formate monohydrate powder samples of specific granulometry were irradiated in a 60 Co gamma-ray irradiation plant and in the mixed field (thermal neutrons and gamma photons) of a boron neutron capture therapy (BNCT) experimental facility. The γ -doses applied with the 60 Co source range from 0.1 to 50 kGy, while those in the BNCT facility go from ~7 Gy to 150 Gy. The thermal neutron fluences range from 10 12 neutrons cm −2 to 2 10 13 neutrons cm −2 . The irradiation of materials promotes the creation of stable electronic defects (generally free radicals) which constitute paramagnetic centers that can be detected and quantified by electron paramagnetic resonance (EPR). After irradiation, the EPR characterization of the samples was performed by determining the EPR intensity of the spectrum relative to a reference standard constituted by Mn<...

中文翻译：

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硼酸中子/ L-丙氨酸EPR双重天然剂量计，用于硼中子俘获疗法辐照设施中的混合辐射场

在60 Co伽马射线辐照设备和硼中子俘获疗法（BNCT）的混合场（热中子和伽马光子）中辐照标准的商用L-丙氨酸颗粒和特别制备的具有特定粒度的天然甲酸甲酸锂一水合物粉末样品。实验设备。施加60 Co离子源的γ剂量范围为0.1至50 kGy，而BNCT装置中的γ剂量范围为〜7 Gy至150 Gy。热中子注量范围从10 12个中子cm -2到2 10 13个中子cm -2。材料的辐射促进了稳定的电子缺陷（通常是自由基）的产生，这些缺陷构成了顺磁性中心，可以通过电子顺磁共振（EPR）进行检测和定量。照射后