In this experimental study, graphene oxide (GO) nanopowder was prepared and irradiated by the 60 Co γ-rays in different absorbed doses of 0, 10, 30, 50, 80, 100, 120 and 150 kGy at dose rate of 1.62 Gy s −1 at room temperature. Field emission scanning electron microscope and high-resolution transmission electron microscopy analyses were used to investigate structural defects in GO material. Then, using Raman spectroscopy, the ratio of I D / I G related to D- and G-bands in the wavenumbers of 1350 and 1586 cm −1 was, respectively, measured in terms of absorbed dose to determine the dose–response of GO material. The results showed that the dose–response of γ-irradiated samples at the dose range of 0–50 kGy was linear. There was a decline in dose–response after 100 kGy due to graphitization of carbon nanostructure material or annealing the defects in the sample. The results of this study showed that the linearity response of γ-irradiated GO as a novel passive dosimeter is suitable for the dosimetry of γ-rays at the radiation processing level.

中文翻译：

---

使用拉曼光谱对γ-辐照氧化石墨烯作为新型剂量计的线性响应进行初步研究

在本实验研究中，制备氧化石墨烯 (GO) 纳米粉末，并用 60 Co γ 射线以 0、10、30、50、80、100、120 和 150 kGy 的不同吸收剂量以 1.62 Gy s 的剂量率辐照-1 在室温下。场发射扫描电子显微镜和高分辨率透射电子显微镜分析用于研究 GO 材料中的结构缺陷。然后，使用拉曼光谱，分别根据吸收剂量测量与 D 波段和 G 波段相关的 ID / IG 在 1350 和 1586 cm -1 波数中的比率，以确定 GO 材料的剂量响应。结果表明，γ-辐照样品在 0-50 kGy 剂量范围内的剂量-反应呈线性。由于碳纳米结构材料的石墨化或样品中的缺陷退火，在 100 kGy 后剂量响应下降。本研究结果表明，γ辐照GO作为一种新型无源剂量计的线性响应适用于辐射处理水平的γ射线剂量测定。