Automated, semi-continuous system for measuring indoor radon progeny activity-weighted size distributions, d(sub p): 0.5-500 nm.

摘要

A system for the detection and measurement of indoor radon progeny activity-weighted size distributions (particle size, d(sub p) > 0.5 nm) and concentration levels has been developed. The system is microcomputer-controlled and involves a combination of multiple wire screen (Graded Screen Array) sampler-detector units operated in parallel. The radioactivity sampled in these units permits the estimation of the radon progeny activity-weighted size distributions and concentration levels on a semi-continuous basis. This paper presents details of the system and describes various stages in the development of the system. Results of field measurements in a residential environment are presented to illustrate the resolution, sensitivity and capabilities of the measurement system. 16 refs., 4 figs., 1 tab.