A PULSE-COUNTING IONIZATION-CHAMBER FOR MEASURING THE RADON CONCENTRATION IN AIR

被引：8

作者：

BALTZER, P ^{[1
]}

GORSTEN, KG ^{[1
]}

BACKLIN, A ^{[1
]}

机构：

[1] GAMMADATA SWEDEN,S-75015 UPPSALA,SWEDEN

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1992年 / 317卷 / 1-2期

关键词：

D O I：

10.1016/0168-9002(92)90629-I

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A pulse-counting ionization chamber with atmospheric air as filling gas has been constructed for the main purpose of measuring the radon concentration in air through its alpha activity. The problem with slow pulses due to the long collection times of the ions has been solved with a combination of a specially designed electrode structure and pulse-shaping electronics optimized for highest energy resolution and count rate. An energy resolution of 0.25 MeV FWHM has been achieved for the peaks associated with the alpha decay of radon and its daughters. This makes it possible e.g. to observe thoron (Rn-220) in the presence of radon (Rn-222). The instrument is portable and has a sensitivity of 1 cpm for a concentration of about 50 Bq/m3 (1.4 pCi/l).

引用

页码：357 / 364

页数：8

共 7 条

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[4]

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[5]

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[6]

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[7]

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