The Electron Paramagnetic Resonance (EPR) spectra of the radicals produced by γ-irradiation of a single crystal of oxalic acid dihydrate (C₂H₆O₆) have been reported. The EPR spectra of gamma-irradiated single crystals of oxalic acid dihydrate have been studied for different orientations of crystals in a magnetic field. As a result of studies carried out along three axes, it has been determined that there are two biradicals. The EPR spectra have been investigated at temperatures between 125 and 450 K. The spectra have been found to be temperature independent. The g values of the radiation damage centers observed in oxalic acid dihydrate acid single crystal and the hyperfine structure constants of the free electron with nearby protons have been obtained from the single crystal EPR analysis.

由单晶草酸二水合物 (C ₂ H ₆ O ₆₎ γ 辐照产生的自由基的电子顺磁共振 (EPR) 光谱） 已经报道。已针对磁场中晶体的不同取向研究了 γ 辐照的二水合草酸单晶的 EPR 光谱。作为沿三个轴进行的研究的结果，已经确定存在两个双自由基。EPR 光谱已在 125 到 450 K 之间的温度下进行了研究。已发现该光谱与温度无关。单晶EPR分析得到了二水草酸单晶辐射损伤中心的g值和质子附近自由电子的超精细结构常数。