Radiation Dose Estimation by Tooth Enamel EPR Dosimetry for Residents of Dolon and Bodene

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  • ZHUMADILOV Kassym
    Research Institute for Radiation Biology and Medicine, Hiroshima University
  • IVANNIKOV Alexander
    Medical Radiological Research Center
  • APSALIKOV Kazbek N.
    Kazak Scientific-Research Institute for Radiation Medicine and Ecology
  • ZHUMADILOV Zhaxybay
    Semipalatinsk State Medical Academy
  • TOYODA Shin
    Department of Applied Physics Faculty of Science Okayama University of Science
  • ZHARLYGANOVA Dinara
    Research Institute for Radiation Biology and Medicine, Hiroshima University
  • TIELIEWUHAN Eldana
    Research Institute for Radiation Biology and Medicine, Hiroshima University
  • ENDO Satoru
    Research Institute for Radiation Biology and Medicine, Hiroshima University
  • TANAKA Kenichi
    Research Institute for Radiation Biology and Medicine, Hiroshima University
  • MIYAZAWA Chuzou
    School of Dentistry, Ohu University
  • OKAMOTO Tetsuji
    Department of Molecular Oral Medicine and Maxillofacial Surgery, Division of Frontier Medical Science, Graduate School of Biomedical Sciences, Hiroshima University
  • HOSHI Masaharu
    Research Institute for Radiation Biology and Medicine, Hiroshima University

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The method of electron paramagnetic resonance (EPR) dosimetry was applied to the enamel of the teeth extracted from the residents of the Dolon and Bodene settlements of the Beskaragay district, which is the area adjacent to the radioactive fallout of the most contaminating nuclear test of 1949. The individual accidental radiation doses due to the fallout were obtained from the amplitude of the radiation induced EPR signal from the CO2- radical using the calibration method, after determining the parameters of EPR measurements to obtain the best reproducibility of the signal intensities. It was shown that after subtracting the natural background dose from the total absorbed dose obtained by EPR the residents of Dolon and Bodene received accidental radiation doses up to 356 mGy with an average value of 74.1 ± 45.5 mGy before 1949 while the younger population received up to about 100 mGy with an average value of 11.5 ± 37.7 mGy.<br>

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