辐射引起的电子自旋共振信号在回顾剂量学中的应用

The application of radiation-induced free radicals signals in retrospective dosimetry

辐射可以激发某些材料以及生物样品产生自由基,电子自旋共振（ESR）波谱仪可以检测到这些自由基信号,而信号的强度与受到电离辐射的剂量相关.利用牙齿的ESR波谱估算核事故的辐射剂量是一种经典的方法.近年来,很多学者研究了指（趾）甲、头发、手机屏幕等易获取材料的ESR波谱与辐射剂量的关系.该文从这些材料的背景信号、剂量学的线性关系、探测下限以及信号的稳定性等方面进行综述,以期为核事故的剂量估算提供更好的依据.

For some materials and biological samples,free radicals can be induced after ionizing radiation.Electron spin resonance （ESR）spectroscopy can detect free radical signal and its intensity can reflect the dose of the ionizing radiation.It is a typical way to estimate the radiation dosimetry by using the ESR spectroscopy of teeth.In recent years,many researchers studied on ESR of easy-getting materials such as finger（toe） nail,hair,cell phone screen,in order to investigate the relationship between signal intensity and radiation dose.The aim of this paper is to survey the current literature about methodologies and the materials on background signal,linearity of dose-response relationship,minimum detection limit and post-irradiation signal stability,so that more data will be provided for nuclear accident dose estimation.