Determination of Cs-137 and Sr-90 in calcareous soils: Geographical distribution on the island of Majorca

被引：22

作者：

Gomez, E ^{[1
]}

Garcias, F ^{[1
]}

Casas, M ^{[1
]}

Cerda, V ^{[1
]}

机构：

[1] UNIV ILLES BALEARS,DEPT FIS,E-07071 PALMA DE MALLORCA,SPAIN

来源：

APPLIED RADIATION AND ISOTOPES | 1997年 / 48卷 / 05期

关键词：

D O I：

10.1016/S0969-8043(96)00330-2

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

In this work radioactive concentrations of the man-made radionuclides Cs-137, Sr-89 and Sr-90 have been studied in calcareous soils of the island of Majorca (Spain), by analysing the top 5 cm of the surface layer. The activity of Cs-137 was determined by gamma-ray spectrometry and ranged from about 10 to 60 Bq/kg. The possibility of carrying out extraction of Sr from calcareous soils was evaluated by using three different methods previously used in other samples with a high calcium content. Only the method based on precipitation in a fuming HNO3 medium gave rise to successful results with a yield of around 75%. The activity of Sr-90 was determined using a low-background alpha-beta proportional counter. Results varied between about 2 and 8 Bq/kg. The activity of Sr-89 was below the lower limit of detection. (C) 1997 Elsevier Science Ltd.

引用

页码：699 / 704

页数：6

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