CR-39 RADON DETECTOR

被引：11

作者：

BING, S

机构：

[1] Laboratory of Industrial Hygiene, Ministry of Public Health, Beijing

来源：

NUCLEAR TRACKS AND RADIATION MEASUREMENTS | 1993年 / 22卷 / 1-4期

关键词：

CR-39; RN-222; DETECTOR; ACCUMULATING MEASUREMENT; TRACK SCANNING;

D O I：

10.1016/0969-8078(93)90106-E

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

This paper presents an easy method of measuring radon - 222 accumulation concentration in air. CR - 39 chips manufactured by Pershore Mouldings LTD. of England and Karlsruhe diffusion chambers are used for radon accumulation detectors. After exposure, the CR - 39 chips are etched in 6.25N NaOH at 80-degrees-C for four hours. Typical and clear alpha tracks can be observed with a microscope. The relationship between alpha track density and radon accumulation concentration is proportional (r>0.9990). The calibration efficiencies of two batches of CR - 39 chips are 5.54 and 5.79 tracks cm-2 per kBq m-3 h, respectively. With one month exposure in air, the detection limit is 7.0 Bq m-3 and standard deviation of the method is less than 15%.

引用

页码：451 / 454

页数：4