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Pubmed for Handhelds

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  • Title: High-resolution alpha spectrometry under field conditions - fast identification of alpha particle emitting radionuclides from air samples.
    Author: Pöllänen R, Siiskonen T.
    Journal: J Environ Radioact; 2006; 87(3):279-88. PubMed ID: 16469421.
    Abstract:
    Alpha particle emitting radionuclides may be released into the atmosphere as a result of a severe nuclear accident, the malevolent use of radioactive material or some other incident. Rapid detection methods are then of crucial importance for carrying out well-timed protective actions. The present paper demonstrates that a method in which an aerosol sample is collected on a filter and directly analysed by high-resolution alpha spectrometry in a vacuum chamber, but without radiochemical sample treatment, is suitable for field measurements. A detection limit of less than 0.1 Bqm(-3) for (239)Pu is achieved assuming 1-h sampling using a glass-fibre filter and 1-h data acquisition. This value is higher than in the case when sampling is performed using a porous membrane filter. A measurement system consisting of standard components is mounted in a vehicle designed for rapid field measurements.
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