ABSTRACT Liquid dosimeter of Bismuth nanoparticles (BiNPs) with a diameter ranged from 5 to 9 nm were synthesized by gamma Co-60 rays irradiation of Bi(NO3)3·5H2O/glycerol solution with various concentrations between 3.4 × 10−3 and 0.014 m/L. The BiNPs were characterized by UV-Vis spectroscopy spectrum and transmission electron microscope (TEM) images. BiNPs exhibit a Plasmon resonance absorption band at 288 nm. The intensity of this band increases with the increase of absorbed doses up to 20 kGy without any additives; the dose range in the presence of ascorbic acid was up to 1.5 kGy as a result of chemical reduction of Bi3+ to Bi0. The effect of ascorbic acid (as reducing agent additive) to Bi(NO3)3·5H2O/glycerol solution was investigated. The results confirmed that the second prepared dosimeter with the addition of ascorbic acid is more sensitive than the dosimeter without addition, these results shown obviously from the dose range of the two dosimeters. In addition, all dosimetric characteristics of BiNPs were studied.

中文翻译：

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辐射诱导的铋纳米颗粒及其作为辐射剂量计的可能用途

摘要 通过伽马 Co-60 射线辐照 3.4 × 10−3 和 0.014 m 之间不同浓度的 Bi(NO3)3·5H2O/甘油溶液合成了直径为 5 到 9 nm 的铋纳米粒子 (BiNPs) 的液体剂量计/L。BiNPs 通过紫外-可见光谱和透射电子显微镜 (TEM) 图像进行表征。BiNPs 在 288 nm 处表现出等离子共振吸收带。该波段的强度随着吸收剂量的增加而增加，最高可达 20 kGy，无需任何添加剂；由于 Bi3+ 化学还原为 Bi0，抗坏血酸存在时的剂量范围高达 1.5 kGy。研究了抗坏血酸（作为还原剂添加剂）对Bi(NO3)3·5H2O/甘油溶液的影响。结果证实添加抗坏血酸的第二个制备的剂量计比不添加的剂量计更灵敏，这些结果从两个剂量计的剂量范围清楚地显示出来。此外，研究了 BiNPs 的所有剂量学特征。