[莫斯科表层土壤中钋-210的分布模式]

[The pattern of distribution of polonium-210 in the superficial soil layer in Moscow].

作者信息

Korenkov I P, Shatokhin A M, Loginov A A, Ivliev M V

出版信息

Gig Sanit. 2000 May-Jun(3):15-7.

Abstract

The pattern of distribution of 210Po, 226Ra, 232Th, and 40K was studied in the superficial soil layer of Moscow. There was a correlation between the soil levels of the natural uranium decay products 210Po and 226Ra. The ratio of specific 210Po, 226Ra activities was 1.3 +/- 2.6 in the soil samples. There is a close correlation between the soil levels of 210Po and its organic substance. The specific activities of the natural radionuclides in the Moscow soil were as follows: 210Po 30-50 Bk/kg, 226Ra 10-30 Bk/kg, 232Th 10-30 Bk/kg, and 40K 200-400 Bk/kg. These levels are no greater than those of those of natural radionuclides in the Earth's crust.

摘要

对莫斯科表层土壤中钋-210、镭-226、钍-232和钾-40的分布模式进行了研究。天然铀衰变产物钋-210和镭-226的土壤含量之间存在相关性。土壤样品中钋-210与镭-226的比活度比值为1.3±2.6。钋-210的土壤含量与其有机物之间存在密切相关性。莫斯科土壤中天然放射性核素的比活度如下：钋-210为30 - 50贝克勒尔/千克，镭-226为10 - 30贝克勒尔/千克，钍-232为10 - 30贝克勒尔/千克，钾-40为200 - 400贝克勒尔/千克。这些含量不高于地壳中天然放射性核素的含量。