Residual plutonium migration in soil of Nagasaki
Residual plutonium migration in soil of Nagasaki
复制标题
长崎土壤中残留钚的迁移
DOI：
10.1029/jb089ib09p07931
复制
发表时间：
1984
影响因子：
--
通讯作者：
S. Miyahara
中科院分区：
文献类型：
--
作者：
Y. Mahara;S. Miyahara
在1945年长崎遭受钚原子弹轰炸36年后，观测到了长崎土壤中残留的/sup 239 + 240/Pu浓度。在西山水库边缘的土壤中发现了最高水平的/sup 239 + 240/Pu污染，比长崎其他地区高出约10-30倍。在西山区，土壤中钚总量的97%保留在0.3米的深度，但其余3%分散在0.3至2.25米的深度，约为0.037 Bq/kg干土。西山土壤中36年的平均/sup 239 + 240/Pu迁移速率估计为1.25 mm yr/sup-1/，而雨水的渗透速率为2500 mm yr/sup-1/。
The residual /sup 239 +240/Pu concentration in the Nagasaki soil was observed 36 years after the plutonium atomic bombing of Nagasakki in 1945. The highest level of /sup 239 +240/Pu contamination was discovered in the soil at the edge of the Nishiyama reservoir, a level about 10-30 times higher than in other areas of Nagasaki. In the Nishiyama district, 97% of the total plutonium in the soil was retained to a depth of 0.3 m, but the remaining 3% was dispersed over a 0.3- to 2.25-m depth at approximately 0.037 Bq/kg of dry soil. The mean /sup 239 +240/Pu migration rate in the Nishiyama soil for 36 years was estimated at 1.25 mm yr/sup -1/, compared to the infiltration rate of rainwater of 2500 mm yr/sup -1/.