Research Group for Nuclear Chemistry, Chemistry, Environment and Radiation Division, Nuclear Science and Engineering Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan.
Tohoku University Hospital, Tohoku University, 1-1 Seiryo-machi, Aoba-ku, Sendai City, Miyagi 980-8574, Japan.
J Radiat Res. 2022 Jul 19;63(4):609-614. doi: 10.1093/jrr/rrac033.
Electron spin resonance (ESR) dosimetry is one of the most powerful tools for radiation dose reconstruction. The detection limit of this technique using human teeth is reported to be 56 mGy or 67 mGy; however, the absorbed dose of Fukushima residents after the Fukushima Daiichi Nuclear Power Plant (FNPP) accident was estimated to be lower than this detection limit. Our aim is to assess the absorbed radiation dose of children in Fukushima Prefecture after the accident; therefore, it is important to estimate the detection limit for their teeth. The detection limit for enamel of deciduous teeth of Japanese children separated by the mechanical method is estimated to be 115.0 mGy. The density separation method can effectively separate enamel from third molars of Japanese people. As we have collected thousands of teeth from children in Fukushima, the present technique may be useful to examine their external absorbed dose after the FNPP accident.
电子自旋共振（ESR）剂量测定是辐射剂量重建最有力的工具之一。据报道，使用人牙进行该技术的检测限为 56mGy 或 67mGy；然而，福岛第一核电站（FNPP）事故后福岛居民的吸收剂量估计低于该检测限。我们的目的是评估福岛县事故后儿童的辐射吸收剂量；因此，估计他们牙齿的检测限很重要。通过机械方法分离的日本儿童乳牙釉质的检测限估计为 115.0mGy。密度分离法可有效分离日本人第三磨牙的釉质。由于我们已从福岛的儿童中收集了数千颗牙齿，因此目前的技术可能有助于检查他们在 FNPP 事故后的外照射吸收剂量。
