Abstract ESR tooth enamel retrospective doses were obtained for teeth of 16 cattle bred in the two ranches located in the area contaminated by Fukushima Dai-ichi Nuclear Power accidents in 2011. The obtained doses are up to 1.0 Gy for cattle bred in both two ranches. The doses obtained for cattle in Omaru ranch, with higher contamination, are roughly consistent with the cumulative environmental dose. High dose values are also obtained for those in Okuma-Ikeda ranch, with lower contamination, which are not consistent with the cumulative environmental dose, but can be explained by the records that they were once released from the ranch and were captured in highly contaminated area. The ESR tooth enamel dose distribution within jaws were examined for two cattle of 12 years and 7 years old. The older cattle shows rather uniform distribution of the doses with slight increase in frontal teeth while the younger shows larger values in molar teeth, being consistent with the time difference in permanent tooth eruption (enamel formation). These results indicate that the cattle tooth enamel ESR dosimetry works practically and would be useful in estimating the actual environmental doses.

中文翻译：

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在福岛第一核电站事故污染地区饲养的牛的牙釉质剂量的 ESR 评估

摘要 对2011年福岛第一核电站事故污染区的两个牧场饲养的16头牛的牙齿进行了ESR牙釉质回溯剂量，得到的两个牧场饲养的牛的剂量均高达1.0 Gy。在污染较高的奥马鲁牧场，牛获得的剂量与累积环境剂量大致一致。大隈池田牧场也得到高剂量值，污染较低，这与累积环境剂量不一致，但可以用它们曾经从牧场释放并在高污染区域捕获的记录来解释. 检查了两只 12 岁和 7 岁牛的颌骨内 ESR 牙釉质剂量分布。年龄较大的牛显示出相当均匀的剂量分布，前牙略有增加，而年轻的牛在臼齿中显示出较大的值，这与恒牙萌出（牙釉质形成）的时间差异一致。这些结果表明，牛牙釉质 ESR 剂量测定法实际可行，可用于估计实际环境剂量。