L.N. Gumilyov Eurasian National University, 010008, Munaitpasova 13, Nur-Sultan, Kazakhstan.
A. Tsyb Medical Radiological Research Center - Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str., 4., Obninsk, Kaluga Region 2490036, Russian Federation.
J Radiat Res. 2022 Aug 13;63(Supplement_1):i61-i65. doi: 10.1093/jrr/rrac024.
Electron spin resonance (ESR) dosimetry was applied to human tooth enamel in order to obtain individual absorbed doses for victims of the Hiroshima bomb who lived in the 'black rain' area. The so-called 'black rain' fell in the form of precipitation on the western part of Hiroshima city and the northwestern suburbs within a few hours after the explosion of the atomic bomb on 6 August 1945, and exposed the population in this area. Only three tooth samples were collected from this area. Since the teeth were located at positions 1, 2 and 4, only the lingual portion was used for the analysis. The results showed that the excess dose after subtracting natural radiation for one (position 4; hh1) was background, for the second (position 2; hh2) it was 133 mGy, and for the other (position 1; hh3) it was 243 mGy. Based on these results, we further investigated the radiation dose attributed to dental X-rays and head CT scan. Such dose of the hh3 radiographic examination was estimated to be 57-160 mGy, which implies an additional exposure around 135 mGy after subtraction. On the other hand, the dose data of hh1 after subtracting dental X-rays was negative. This may mean that such additional doses are an overestimation. In addition, the effect of sunlight should be considered, which is the same direction of overestimation. As a result, the residual dose of 140 mGy suggests the inclusion of radiation from the 'black rain.'
电子自旋共振（ESR）剂量测定法被应用于人类牙釉质，以获取生活在广岛原子弹爆炸“黑雨”区的受害者的个体吸收剂量。所谓的“黑雨”是在 1945 年 8 月 6 日原子弹爆炸后的几个小时内，以降水的形式降落在广岛市西部和西北郊区，使该地区的人口暴露于此。该地区仅采集到了三个牙齿样本。由于这些牙齿位于 1、2 和 4 号位置，因此仅对舌侧部分进行了分析。结果表明，扣除天然辐射后，第一个（4 号位置；hh1）的过量剂量为背景值，第二个（2 号位置；hh2）为 133mGy，另一个（1 号位置；hh3）为 243mGy。基于这些结果，我们进一步研究了牙科 X 射线和头部 CT 扫描的辐射剂量。hh3 射线照相检查的这种剂量估计为 57-160mGy，意味着扣除后额外暴露约 135mGy。另一方面，扣除牙科 X 射线后 hh1 的剂量数据为负值。这可能意味着这种额外剂量是高估的。此外，还应考虑阳光的影响，这是相同的高估方向。因此，残留的 140mGy 剂量表明包括了“黑雨”中的辐射。
