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- Beta_attenuation_monitoring abstract "Beta attenuation monitoring (BAM) is a widely used air monitoring technique employing the absorption of beta radiation by solid particles extracted from air flow. This technique allows for the detection of PM10 and PM2.5, which are monitored as standards by most air pollution regulatory agencies. The main principle is based on a kind of Bouguer (Lambert–Beer) law: the amount by which the flow of beta radiation (electrons) is attenuated by a solid matter is exponentially dependent on its mass and not on any other feature (such as density, chemical composition or some optical or electrical properties) of this matter. So, the air is drawn from outside of the detector through an \"infinite\" (cycling) ribbon made from some filtering material so that the particles are collected on it. There are two sources of beta radiation placed one before and one after the region where air flow passes through the ribbon leaving particles on it; and there are also two detectors on the opposite side of the ribbon, facing the detectors. The sources' intensity and detectors' sensitivity being the same (or corrected with appropriate calibration lookup table), the intensity of beta rays detected by one of detectors is compared to that of the other. Thus one can deduce how much mass has the ribbon acquired upon being exposed to air flow; knowing the drain velocity, actual particle mass concentration in air could be assessed.The radiation source can be a gas chamber, filled with 86Kr gas, or a pieces of 14C-rich polymer plastic, such as PMMA. Detector is simply a Geiger–Mueller counter. The particulate matter content measured is affected by the moisture content in the air, unfortunately.To discriminate between particle of different sizes (e. g., between PM10 and PM2.5), some preliminary separation could be accomplished, for example, by cyclone battery.A similar method exists, where instead of beta particle flow an X-ray Fluorescence Spectroscopic monitoring is applied on the either side of air flow contact with the ribbon. This allows to obtain not only cumulative measurement of particle mass, but also to detect their average chemical composition (technique works for potassium and elements heavier than it).".
- Beta_attenuation_monitoring thumbnail Beta_attenuation_detector.svg?width=300.
- Beta_attenuation_monitoring wikiPageExternalLink criteria.html.
- Beta_attenuation_monitoring wikiPageID "41420172".
- Beta_attenuation_monitoring wikiPageLength "4323".
- Beta_attenuation_monitoring wikiPageOutDegree "32".
- Beta_attenuation_monitoring wikiPageRevisionID "638123475".
- Beta_attenuation_monitoring wikiPageWikiLink Absorption_(electromagnetic_radiation).
- Beta_attenuation_monitoring wikiPageWikiLink Air_filter.
- Beta_attenuation_monitoring wikiPageWikiLink Automated_airport_weather_station.
- Beta_attenuation_monitoring wikiPageWikiLink Beer–Lambert_law.
- Beta_attenuation_monitoring wikiPageWikiLink Beta_particle.
- Beta_attenuation_monitoring wikiPageWikiLink Calibration_curve.
- Beta_attenuation_monitoring wikiPageWikiLink Carbon-14.
- Beta_attenuation_monitoring wikiPageWikiLink Category:Aerosols.
- Beta_attenuation_monitoring wikiPageWikiLink Category:Air_pollution.
- Beta_attenuation_monitoring wikiPageWikiLink Category:Detectors.
- Beta_attenuation_monitoring wikiPageWikiLink Category:Measuring_instruments.
- Beta_attenuation_monitoring wikiPageWikiLink Category:Meteorological_instrumentation_and_equipment.
- Beta_attenuation_monitoring wikiPageWikiLink Category:Radioactivity.
- Beta_attenuation_monitoring wikiPageWikiLink Cyclonic_separation.
- Beta_attenuation_monitoring wikiPageWikiLink Density.
- Beta_attenuation_monitoring wikiPageWikiLink Electricity.
- Beta_attenuation_monitoring wikiPageWikiLink Electron.
- Beta_attenuation_monitoring wikiPageWikiLink Geiger_counter.
- Beta_attenuation_monitoring wikiPageWikiLink Intensity_(physics).
- Beta_attenuation_monitoring wikiPageWikiLink Krypton.
- Beta_attenuation_monitoring wikiPageWikiLink Mass.
- Beta_attenuation_monitoring wikiPageWikiLink Moisture.
- Beta_attenuation_monitoring wikiPageWikiLink Optics.
- Beta_attenuation_monitoring wikiPageWikiLink Particulates.
- Beta_attenuation_monitoring wikiPageWikiLink Poly(methyl_methacrylate).
- Beta_attenuation_monitoring wikiPageWikiLink Potassium.
- Beta_attenuation_monitoring wikiPageWikiLink Sensitivity_(electronics).
- Beta_attenuation_monitoring wikiPageWikiLink Solid.
- Beta_attenuation_monitoring wikiPageWikiLink X-ray_fluorescence.
- Beta_attenuation_monitoring wikiPageWikiLink File:Beta_attenuation_detector.svg.
- Beta_attenuation_monitoring wikiPageWikiLinkText "Beta attenuation monitoring".
- Beta_attenuation_monitoring wikiPageWikiLinkText "beta attenuation cell".
- Beta_attenuation_monitoring wikiPageUsesTemplate Template:Reflist.
- Beta_attenuation_monitoring subject Category:Aerosols.
- Beta_attenuation_monitoring subject Category:Air_pollution.
- Beta_attenuation_monitoring subject Category:Detectors.
- Beta_attenuation_monitoring subject Category:Measuring_instruments.
- Beta_attenuation_monitoring subject Category:Meteorological_instrumentation_and_equipment.
- Beta_attenuation_monitoring subject Category:Radioactivity.
- Beta_attenuation_monitoring comment "Beta attenuation monitoring (BAM) is a widely used air monitoring technique employing the absorption of beta radiation by solid particles extracted from air flow. This technique allows for the detection of PM10 and PM2.5, which are monitored as standards by most air pollution regulatory agencies.".
- Beta_attenuation_monitoring label "Beta attenuation monitoring".
- Beta_attenuation_monitoring sameAs Q17005411.
- Beta_attenuation_monitoring sameAs m.0zrsyc7.
- Beta_attenuation_monitoring sameAs Q17005411.
- Beta_attenuation_monitoring wasDerivedFrom Beta_attenuation_monitoring?oldid=638123475.
- Beta_attenuation_monitoring depiction Beta_attenuation_detector.svg.
- Beta_attenuation_monitoring isPrimaryTopicOf Beta_attenuation_monitoring.