222Rn emanation measurements at extremely low activities

被引：32

作者：

Rau, W ^{[1
]}

Heusser, G ^{[1
]}

机构：

[1] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany

来源：

APPLIED RADIATION AND ISOTOPES | 2000年 / 53卷 / 1-2期

关键词：

The authors acknowledge the valuable contribution by Y. Zacharov to the development of the data acquisition system and the sample preparation procedure. The help of B. Freudiger and H. Simgen with some measurements is greatly appreciated. W. Rau thanks the INFN (Istituto Nazionale di Fisica Nucleare; Italy) for financial support;

D O I：

10.1016/S0969-8043(00)00155-X

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

For the solar neutrino experiment Borexino, a system has been set up to measure emanation of Rn-222 in, samples of up to 80 litres volume. The apparatus has been constructed to high vacuum standard and consists mainly of parts made from electropolished stainless steel. The low blank activity of the system together with a highly sensitive detection method for the extracted Rn leads to a sensitivity level in the range 70-100 mu Bq Rn-222. Due to the large sample capacity of the emanation chambers, it is possible to measure specific emanation rates as low as several mu Bq/m(2). Some measurements characterizing the performance of the apparatus are discussed. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：371 / 375

页数：5

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