Radionuclide Ratios in Precipitation on the Territory of Belarus After the Chernobyl Accident: Calculation from Gamma-Spectrometric Measurements on Soil in May-July 1986
Radionuclide Ratios in Precipitation on the Territory of Belarus After the Chernobyl Accident: Calculation from Gamma-Spectrometric Measurements on Soil in May-July 1986
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DOI：
10.1007/s10512-014-9902-4
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发表时间：
2014-12-01
期刊：
影响因子：
0.5
通讯作者：
Drozdovitch, V. V.
中科院分区：
文献类型：
--
作者：
Khrushchinskii, A. A.;Kuten', S. A.;Drozdovitch, V. V.
使用1986年5月至7月在土壤上进行的伽马能谱测量获得的数据，研究了切尔诺贝利核电站事故后白俄罗斯不同地区放射性核素的沉降物密度和比率之间的相关性。结果表明，铯和/或钌的同位素是最适合重建的I-131在沉降物中的活性。绘制了沉降物中I-131/Cs-137和Cs-134/Cs-137活度比等值线图。1986年5月10日，Cs-134/Cs-137和I-131/Cs-137比值的对数正态分布的几何平均值分别为0.47和5.4。沉降物中I-131/Cs-137活度比的分布和相关系数表明，总体上这些放射性核素的沉降指数之间没有一致的相关性。
The correlations between the fallout density and ratio of radionuclides in different regions of Belarus after the accident at the Chernobyl NPP are investigated using data obtained by means of gamma-spectrometric measurements performed on soil in May-July 1986. It is shown that the isotopes of cesium and/or ruthenium are most suitable for reconstructing the activity of I-131 in the fallout. Charts showing the isolines of the activity ratios I-131/Cs-137 and Cs-134/Cs-137 in the fallout are constructed. The geometric averages obtained for the log-normal distribution of the ratios Cs-134/Cs-137 and I-131/Cs-137 in terms of May 10, 1986 equal 0.47 and 5.4, respectively. The distribution of the activity ratio I-131/Cs-137 in the fallout and the correlation coefficients show that on the whole there is no consistent interrelation between the fallout indices of these radionuclides over the territory.