Authors:
A. McKinnon Pacific Northwest National Laboratory 99352 Richland WA USA

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S. Bowyer Pacific Northwest National Laboratory 99352 Richland WA USA

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C. Hubbard Pacific Northwest National Laboratory 99352 Richland WA USA

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H. Miley Pacific Northwest National Laboratory 99352 Richland WA USA

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R. Perkins Pacific Northwest National Laboratory 99352 Richland WA USA

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R. Thompson Pacific Northwest National Laboratory 99352 Richland WA USA

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R. Warner Pacific Northwest National Laboratory 99352 Richland WA USA

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Abstract  

A Radionuclide Aerosol Sampler/Analyzer (RASA Mark 4) has been developed at PNNL for use in verifying the Comprehensive Nuclear Test Ban Treaty (CTBT). The RASA Mark 4 collects about 20,000 m3 of air per day on a 0.25 m2 filter. This filter is automatically decayed for 24 hours, then advanced to a germanium detector for a 24 hour count. This system has been operated in Richland, WA for a limited period of time in a predeployment testing phase. The germanium-detector gamma-ray spectra have been analyzed by automatic spectral analysis codes to determine Minimum Detectable Concentrations (MDC) for a number of isotopes of interest. These MDC's have been compared to other atmospheric measurements in the field and in the laboratory.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)