polycrystalline samples at room temperature. Furthermore, the (1)H-hf and (6)Li-hf tensors observed for the surroundings of CO(2)(-) by ENDOR technique were in fairly good agreement with DFT calculations. The CO(2)(-) radicals are found to be so stable that the formate is applicable to the ESR dosimetry, because of fully relaxing in a fully relaxed geometrical structure of the CO(2)(-) component and remaining tight
研究了
甲酸锂((6)LiOOCH.H(2)O),95%的(6)Li富集度以及结晶
水与D(2)O的交换情况。在室温下稳定的辐射诱导自由基的ESR光谱由线宽为0.92mT的单线态组成。(6)Li具有较小的磁矩和核自旋,从而导致较窄的线宽以及峰值幅度的增加。与具有天然同位素组成的
甲酸锂(6)Li(7.5%,I = 1)和(7)Li(92.5%,I = 3/2)相比,灵敏度提高了两倍。通过优化的光谱仪设置(6),
甲酸甲酰胺的灵敏度是丙
氨酸的7倍。因此,该材料被建议作为剂量计材料,剂量范围低至0.1Gy。g和CO(2)(-)自由基阴离子的(13)C-超细(hf)张量,在室温下,对于多晶样品,主要的顺磁产物被评估为g =(2.0037,1.9975,2.0017),A((13)C)=(465.5,447.5,581.3)
MHz。此外,通过ENDOR技术观察到的CO(2)(-)周围的(1)H-hf和(6