Using 226Ra/228Ra disequilibrium to determine the residence half-lives of radium in vegetation compartments

被引：11

作者：

Baeza, A ^{[1
]}

Barandica, J ^{[1
]}

Paniagua, JM ^{[1
]}

Rufo, M ^{[1
]}

Sterling, A ^{[1
]}

机构：

[1] Fac Vet, Dept Fis, Caceres 10071, Spain

来源：

JOURNAL OF ENVIRONMENTAL RADIOACTIVITY | 1999年 / 43卷 / 03期

关键词：

D O I：

10.1016/S0265-931X(98)00047-2

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The concentrations of Ra-226 and Ra-228 were studied in different vegetation compartments and in available and non-available soil fractions in a Mediterranean scrubland ecosystem. A high percentage of the plant samples showed an apparent discrimination in favour of Ra-226 Ra-228. A linear compartmental model was applied to the soil-plant system. It allowed us over to explain why these discrimination coefficients differed from unity, to obtain the residence half-lives of radium in the different compartments, to estimate the age of the plants, and to simulate the temporal evolution of the radioactive concentrations in each compartment. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：291 / 304

页数：14

共 37 条

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