Departamento de Física e Matemática, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901 Ribeirão Preto-SP, Brazil.
Health Phys. 2010 Feb;98(2):427-31. doi: 10.1097/01.HP.0000348463.28658.54.
Dose evaluation by electron spin resonance (ESR) is usually accomplished by constructing a dose-response curve by measuring the peak-to-peak intensity of the dosimetric signals in the g = 2 region. In several cases, this signal is overlapped with others that can interfere with dose reconstruction. In this work a new method to correct the spectrum before the measurement of the signal intensity is proposed. Examples of dose determination of accumulated dose (AD) of two fossil teeth from southern Brazilian megafauna are given. One of them presents a dose-independent signal in the region of interest, and the validity of this method is shown. For the other, without interfering signals, no difference in the AD was found. This method can also be applied to retrospective dosimetry by ESR for any sample with dose-independent interfering signals, thus improving the accuracy in AD determination by ESR.
通过电子自旋共振（ESR）进行剂量评估通常通过在 g = 2 区域测量剂量测量信号的峰峰值强度来构建剂量响应曲线来完成。在某些情况下，该信号与其他可能干扰剂量重建的信号重叠。在这项工作中，提出了一种在测量信号强度之前校正光谱的新方法。给出了来自巴西南部巨型动物化石牙齿的累积剂量（AD）剂量测定的例子。其中一个在感兴趣的区域呈现出与剂量无关的信号，并且该方法的有效性得到了证明。对于另一个没有干扰信号的区域，没有发现 AD 的差异。该方法还可以应用于任何具有与剂量无关的干扰信号的样品的 ESR 回顾性剂量测定，从而提高 ESR 中 AD 测定的准确性。
