Electron paramagnetic resonance (EPR) signals generated by ionizing radiation in touch-screen glasses have been reported as useful for personal dosimetry in people accidently exposed to ionizing radiation. This article describes the effect of light exposure on EPR spectra of various glasses obtained from mobile phones. This effect can lead to significant inaccuracy of the radiation doses reconstructed by EPR. The EPR signals from samples unexposed and exposed to X-rays and/or to natural and artificial light were numerically separated into three model spectra: those due to background (BG), radiation-induced signal (RIS), and light-induced signal (LIS). Although prolonged exposures of mobile phones to UV light are rather implausible, the article indicates errors underestimating the actual radiation doses in dose reconstruction in glasses exposed to UV light even for low fluences equivalent to several minutes of sunshine, if one neglects the effects of light in applied dosimetric procedures. About 5 min of exposure to sunlight or to light from common UV lamps reduced the intensity of the dosimetric spectral components by 20–60% as compared to non-illuminated samples. This effect strongly limits the achievable accuracy of retrospective dosimetry using EPR in glasses from mobile phones, unless their exposure to light containing a UV component can be excluded or the light-induced reduction in intensity of the RIS can be quantitatively estimated. A method for determination of a correction factor accounting for the perturbing light effects is proposed on basis of the determined relation between the dosimetric signal and intensity of the light-induced signal.

据报道，由触摸屏眼镜中的电离辐射产生的电子顺磁共振（EPR）信号对于意外暴露于电离辐射的人们的个人剂量测定很有用。本文介绍了曝光对从手机获得的各种眼镜的EPR光谱的影响。这种效应可能导致EPR重建的辐射剂量存在严重误差。将未暴露和暴露于X射线和/或自然和人造光的样品的EPR信号在数值上分为三个模型光谱：背景（BG），辐射诱导信号（RIS）和光诱导信号（ LIS）。尽管将手机长时间暴露在紫外线下是不可行的，这篇文章指出了即使在低剂量下等效于几分阳光的情况下，暴露于紫外线下的玻璃剂量重建中的实际辐射剂量也被低估了的误差，如果忽略了在应用的剂量学程序中光的影响。与未照射样品相比，在阳光或普通紫外线灯照射下大约5分钟可将剂量光谱成分的强度降低20–60％。这种影响强烈限制了使用EPR技术在手机玻璃中进行回顾性剂量测定的可达到的精度，除非可以排除将其暴露在含有UV成分的光中或可以定量估计光致RIS强度的降低。