Procedures for the determination of 222Rn exhalation and effective 226Ra activity in soil samples

被引：20

作者：

Escobar, VG ^{[1
]}

Tomé, FV

Lozano, JC

机构：

[1] Univ Extremadura, Escuela Politecn, Dept Fis, Caceres 10071, Spain

[2] Univ Extremadura, Dept Fis, E-06071 Badajoz, Spain

[3] Univ Salamanca, Fac Ciencias, Lab Radiact Ambiental, E-37008 Salamanca, Spain

来源：

APPLIED RADIATION AND ISOTOPES | 1999年 / 50卷 / 06期

关键词：

D O I：

10.1016/S0969-8043(98)00121-3

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Two methods for measuring Rn-222 exhalation and effective Ra-226 in soil samples were studied. In the first determination, the method employed was based on the adsorption of radon onto activated charcoal and subsequent measurement of the activity of its daughters with an HPGe (high-purity germanium) detector. In the second, vials containing an aqueous suspension of the sample, mixed with an insoluble high efficiency mineral oil scintillation cocktail, were measured using a low-level liquid scintillation counter. Studies of optimum sampling time, efficiency in both procedures, variation of Ra-226 efficiency with quenching, as well as the effect of sample amount and granulometry upon the quenching parameter, were carried out. The two methods were applied to the determination of Rn-226 exhalation and effective Ra-226 in environmental samples. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：1039 / 1047

页数：9

共 18 条

[1] THE EFFECT OF GRAIN-SIZE ON THE RADON EMANATION RATE [J].