A high-sensitivity large volume cryogenic detector for radon in gas

被引：7
|
作者：
Wojcik, M. [1 ]
Zuzel, G. [2 ]
机构：
[1] M Smoluchowski Inst Phys, PL-30059 Krakow, Poland
[2] Max Planck Inst Nucl Phys, D-69117 Heidelberg, Germany
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2008年 / 277卷 / 01期
关键词：
Radon; Stainless Steel Plate; Minimum Detectable Activity; 222Rn Concentration; Cold Plate;
D O I：
10.1007/s10967-008-0730-7
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A new detector for Rn-222 measurements in gases is described. It is based on the low temperature collection of radon on a stainless steel plate and subsequent counting of emitted alpha-particles using an ion-implanted silicon detector. A very low background of 25 counts/day for the Rn-222 energy window was achieved. High detection efficiency of 32% (2 pi geometry) and the large 65 liter volume of the detector allow radon measurements at the level of 12 mBq/m(3) with 30% accuracy (relative error). Behavior of the alpha-emitting radon daughters born on the cooled stainless steel plate, Po-218 and Po-214, was also analyzed.
引用
收藏
页码：199 / 205
页数：7
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