A SIMPLE SYSTEM FOR RADON-IN-AIR CONCENTRATION DETERMINATIONS

被引：8

作者：

HOWARD, AJ

CARROLL, SE

STRANGE, WP

机构：

来源：

AMERICAN JOURNAL OF PHYSICS | 1991年 / 59卷 / 06期

关键词：

D O I：

10.1119/1.16817

中图分类号：

G40 [教育学];

学科分类号：

040101 ; 120403 ;

摘要：

Electrostatic precipitation within a 20.4-l container onto a solid-state charged-particle detector is employed to simultaneously collect and detect radon-decay daughter ions. Essentially complete isolation of the 6003-keV alpha particles associated with Po-218(84) decay, for which the half-life is 3.05 min, allows radon concentrations in clean, dry air of 4 pCi/l to be determined in 15 min of operation with approximately 11% statistical uncertainty. A detailed description of this simple system is given, and its absolute detection efficiency is measured as a function of precipitation voltage and relative humidity.

引用

页码：544 / 550

页数：7

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