Zaky Zaky A, Hassan Taher S, Zhaketov V D, El Tokhy Mohamed S, Sallah Mohammed
TH-PPM Group, Physics Department, Faculty of Sciences, Beni-Suef University, Beni Suef, 62514, Egypt.
Academy of Scientific Research and Technology (ASRT), Cairo, Egypt.
Sci Rep. 2025 Apr 29;15(1):14995. doi: 10.1038/s41598-025-94555-4.
This study looks at two photonic crystals that are similar to Cantor's and are separated by a thin layer of sensitive, porous silicon made of poly(ethylene oxide) nanocomposite and potassium iodide, which is used as a gamma indicator. Modifications in the distinct peak versus the irradiation dose track how the proposed indicator responds to radiation. The results demonstrate that gamma radiation alters the refractive index of the poly(ethylene oxide) nanocomposite, causing the distinct peaks to shift. The impact of doping of nanocomposite with potassium iodide, the porosity of silicon, and the cell's number is analyzed. Doping the sensitive nanocomposite with potassium iodide showed a negative effect. The proposed indicator recorded a high sensitivity of 0.218 nm/Gy (nm/Gy = nanometer/gray) for low gamma doses up to 100 Gy, and a moderated sensitivity of 0.13 nm/Gy for high gamma dose from 100 to 200 Gy. The suggested indicator demonstrated high sensitivity in low gamma detection.
本研究考察了两种类似于康托集的光子晶体，它们被一层由聚环氧乙烷纳米复合材料和碘化钾制成的敏感多孔硅薄层隔开，碘化钾用作伽马指示剂。不同峰值相对于辐照剂量的变化跟踪了所提出的指示剂对辐射的响应情况。结果表明，伽马辐射改变了聚环氧乙烷纳米复合材料的折射率，导致不同峰值发生偏移。分析了纳米复合材料用碘化钾掺杂、硅的孔隙率以及单元数量的影响。纳米复合材料用碘化钾掺杂显示出负面影响。所提出的指示剂在高达100 Gy的低伽马剂量下记录到0.218 nm/Gy（nm/Gy = 纳米/格雷）的高灵敏度，在100至200 Gy的高伽马剂量下记录到0.13 nm/Gy的适度灵敏度。所建议的指示剂在低伽马检测中表现出高灵敏度。
