| Micrometer-sized short-lived radioactive aerosol particles for convenient use in laboratory measurements. | |
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MedLine Citation:
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PMID: 12046757 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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For calibration and testing of radioactive aerosol measuring equipment such as continuous air monitors and cascade impactors, and other research applications, it is helpful to have a convenient and relatively safe means of producing radioactive aerosol particles of controlled size and activity. We describe a technique for producing such particles in the micrometer-diameter size range using electrostatic deposition of radon decay products onto otherwise nonradioactive powders of different sizes. An electric field focuses radon decay products (primarily 218Po) onto the surface of a powdered substrate that is then suspended by a technique such as pneumatic dry dispersion. Only a modest-activity commercial 222Rn source (e.g., containing as little as 10(5) Bq of 226Ra) is required, and issues of radioactive cleanup and contamination are minimized due to the short half-lives (26.8 min or less) of the decay products. We report representative results using powders of glass beads, iron oxide, and iron and gold metals in the size range of 0.3 to 30 microm. Yields for the deposited radioactivity per unit concentration of 222Rn gas were of the order of 5 x 10(-7) Bq (214Bi) per milligram substrate per Bq m(-3) of 222Rn for an electrostatic collection time of 30 min. |
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Authors:
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S Huang; S D Schery; R E Alcantara; N V Dale; J C Rodgers |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Health physics Volume: 82 ISSN: 0017-9078 ISO Abbreviation: Health Phys Publication Date: 2002 Jun |
Date Detail:
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Created Date: 2002-06-05 Completed Date: 2002-06-28 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 2985093R Medline TA: Health Phys Country: United States |
Other Details:
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Languages: eng Pagination: 847-54 Citation Subset: IM |
Affiliation:
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Geophysical Research Center, New Mexico Institute of Mining and Technology, Socorro 87801, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Aerosols Alpha Particles Half-Life Particle Size Polonium / analysis Radioisotopes / analysis* Radiometry Radon Daughters / analysis Static Electricity |
| Chemical | |
Reg. No./Substance:
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0/Aerosols; 0/Radioisotopes; 0/Radon Daughters; 7440-08-6/Polonium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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