@inproceedings{oai:repo.qst.go.jp:00053664,
 author = {Muramatsu, Yasuyuki and Ishigure, Nobuhito and Noda, Yutaka and Yonehara, Hidenori and Yoshida, Satoshi and Yukawa, Masae and Tagami, Keiko and Ban-nai, Tadaaki and Uchida, Shigeo and Akashi, Makoto and Hirama, Toshiyasu and Nakamura, Yuuji and 村松 康行 and 石榑 信人 and 野田 豐 and 米原 英典 and 吉田 聡 and 湯川 雅枝 and 田上 恵子 and 坂内 忠明 and 内田 滋夫 and 明石 真言 and 平間 敏靖 and 中村 裕二},
 book = {International Symposium on the Criticality Accident in Tokaimura : Medical Aspects of Radiation Emergency : Proceedings},
 issue = {NIRS-M-146},
 month = {},
 note = {Concentrations of radionuclides in blood, urine, vomit and hair samples from three heavily exposed patients were determined by gamma-spectrometry. Activation products such as 24Na, 42K and 82Br were identified in these materials. The radionuclide of the highest activity observed in biological material was 24Na, e. g. the concentrations of this nuclide in the blood samples from the three patients at the accident time were 169, 92 and 23 Bq ml^-1^. Concentrations of the stable Na in the same samples were determined by ICP-AES to obtain specific activities (concentration ratio between the produced 24Na and stable 23Na). The specific activities of 24Na obtained for the three patients through the blood analysis were 8.24*10^4^, 4.34*10^4^ and 1.23*10^4^Bq24Na/g23Na, respectively. Based on these values, neutron fluences for the  three patients were estimated to be 5.7*10^11^, 3.0*10^11^ and 0.85 *10^11^ cm^-2^, respectively. Absorbed doses for three patients due to neutrons were estimated to be 5.4, 2.9 and 0.81Gy, those due to gamma-rays 8.5-13, 4.5-6.9 and 1.3-2.0Gy, respectively.},
 pages = {90--100},
 publisher = {National Institute of Radiological Sciences},
 title = {Estimation of radiation doses for three exposed patients in the Tokai-mura accident based on 24Na in their biological materials.},
 year = {2001}
}