Endo Satoru, Tanaka Kenichi, Shizuma Kiyoshi, Hoshi Masaharu, Imanaka Tetsuji
Quantum Energy Applications, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan.
Radiat Prot Dosimetry. 2012 Mar;149(1):84-90. doi: 10.1093/rpd/ncr407. Epub 2011 Oct 31.
Beta-ray skin dose due to the fission fallout from the Hiroshima atomic bomb is potentially related to the epilation in the black rain area. The absorbed dose to the skin from beta-rays emitted by fission fallout has been estimated for an initial ¹³⁷Cs deposition of 1 kBq m⁻² on the ground at 0.5 h after the explosion. The estimated skin dose takes into account both external exposure from fission fallout radionuclides uniformly distributed in 1 mm of soil on the surface of the ground and from a 26 μm thickness of contaminated soil on the skin, using the Monte Carlo radiation transport code MCNP-4C. The cumulative skin dose for 1 month after the explosion is taken as the representative value. The estimated skin dose for an initial ¹³⁷Cs deposition of 1 kBq m⁻² was determined to be about 500 mSv.
广岛原子弹裂变沉降物产生的β射线皮肤剂量可能与黑雨区域的脱毛现象有关。对于爆炸后0.5小时地面上初始¹³⁷Cs沉积量为1 kBq m⁻²的情况，已估算了裂变沉降物发射的β射线对皮肤的吸收剂量。使用蒙特卡罗辐射传输代码MCNP - 4C，估算的皮肤剂量考虑了地面表面1毫米土壤中均匀分布的裂变沉降放射性核素的外照射以及皮肤表面26微米厚污染土壤的外照射。爆炸后1个月的累积皮肤剂量被用作代表值。初始¹³⁷Cs沉积量为1 kBq m⁻²时估算的皮肤剂量确定约为500 mSv。
