Intrinsic background of the beta channel of the aerosol volumetric activity monitor

IF 0.1 Q4 INSTRUMENTS & INSTRUMENTATION
A. Kozyrenko, O. Letuchyy, Andrei Pystovyi, V. Skliarov
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引用次数: 0

Abstract

The work is devoted to the study of the features of generation of the intrinsic background of the measuring beta channel of the aerosol monitor in real conditions of measuring the volumetric activity of aerosols, caused by radionuclides of technogenic origin. The influence of external factors on the generation of the level of the intrinsic background of the measuring channel of the monitor and its metrological characteristics is investigated. The reliability of the results of measurements of the volumetric activity of air aerosols substantially depends on the correct accounting of external factors, parameters of the monitored environment and the specified operating mode of the monitor. Aerosol volumetric activity monitors, as a rule, operate in a continuous mode, in which the aspiration method of aerosol accumulation is implemented, followed by measuring the volumetric activity of aerosols by alpha radiation and (or) beta radiation generated by technogenic radionuclides. This article describes the results of experiments on measuring the iCAM aerosol monitor’s intrinsic beta channel background under real operating conditions, and its dependence on external factors. The studies were carried out on iCAM aerosol monitors (iCAM/D and iCAM/MF modifications) manufactured by Canberra Industries Inc. in a laboratory room in normal climatic conditions with a radon volumetric activity of 35±10 Bq·m-3 and an equivalent dose rate of gamma radiation of 0.13±0.02 μSv·h-1. In modern aerosol monitors, software and hardware solutions are implemented that allow to significantly reduce the background level and, as a result, to expand the measurement range of the volumetric activity of aerosols towards low values.
气溶胶体积活动性监测仪β通道的固有本底
本文主要研究了气溶胶监测仪在测量由技术来源的放射性核素引起的气溶胶体积活度的实际条件下,测量β通道固有本底产生的特点。研究了外部因素对监视器测量通道本底电平产生及其计量特性的影响。空气气溶胶体积活度测量结果的可靠性在很大程度上取决于对外部因素、被监测环境的参数和监测器的指定操作模式的正确计算。气溶胶体积活度监测仪通常以连续模式工作,其中采用气溶胶积聚的吸吸法,然后通过技术核素产生的α辐射和(或)β辐射测量气溶胶的体积活度。本文介绍了在实际工作条件下测量iCAM气溶胶监测仪固有通道本底的实验结果及其对外部因素的依赖关系。研究在堪培拉工业公司生产的iCAM气溶胶监测仪(iCAM/D和iCAM/MF改型)上进行,氡体积活度为35±10 Bq·m-3, γ辐射等效剂量率为0.13±0.02 μSv·h-1,气候条件正常。在现代气溶胶监测仪中,实现了软件和硬件解决方案,可以显着降低背景水平,从而将气溶胶体积活动的测量范围扩大到低值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Ukrainian Metrological Journal
Ukrainian Metrological Journal INSTRUMENTS & INSTRUMENTATION-
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