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  • 1
    Electronic Resource
    Electronic Resource
    Search for the production of particle-stable neutral nuclei at multi-GeV energies
    Amsterdam : Elsevier
    Physics Letters B 72 (1977), S. 163-165 
    Details
    ISSN: 0370-2693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0370-2693(77)90691-8
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  • 2
    Electronic Resource
    Electronic Resource
    90Sr and239+240Pu238Pu241Am in some samples of mushrooms and forest soil from Poland (1993)
    Springer
    Journal of radioanalytical and nuclear chemistry 170 (1993), S. 243-258 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Strontium-90, plutonium and americium activity concentrations in a few samples of forest soils, some species of mushrooms and fern leaves have been determined. These results are compared with cesium activity concentrations in the same materials obtained in a previous work. Radiochemical procedures are described. The origin of the contamination (Chernobyl accident or nuclear test explosion release) is discussed. The90Sr activity concentration ranges from 0.6 Bq/kg (mushroom samples) to 48.4 Bq/kg (fern leaves). For239+240Pu, it ranges from not detected above background (mushrooms, fern) to 10.8 Bq/kg (humus layer of forest soil). The maximum concentration of241Am is found to be 2.4 Bq/kg (humus sample) and for238Pu it is 0.85 Bq/kg (also in the humus sample).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02134596
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  • 3
    Electronic Resource
    Electronic Resource
    Analysis of actinides in the primary coolant of a WWER-440 type reactor (1993)
    Springer
    Journal of radioanalytical and nuclear chemistry 170 (1993), S. 399-409 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A simple and effective method has been developed for the determination of the transuranium isotopes in primary coolant samples of WWER-440 type reactors. Membrane filters containing undissolved particles from about one liter coolant were destroyed by mineral acids, then americium-curium isotopes and neptunium-plutonium isotopes were coprecipitated sequentially with NdF3 based on their different redox behavior. Alpha-spectra were determined by silicon semiconductor detectors connected to multichannel analyzers. Activity ratios measured in a reactor unit with a failed fuel element were compared with calculated values of the same type of reactor under similar conditions. Parameters of the defective fuel (burnup, original enrichment) could be estimated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02041476
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  • 4
    Electronic Resource
    Electronic Resource
    Combined procedure for the determination of90Sr,241Am and Pu radionuclides in soil samples (1997)
    Springer
    Journal of radioanalytical and nuclear chemistry 226 (1997), S. 279-284 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A combined procedure for sequential determination of low level activity concentrations of90Sr,241Am and Pu radionuclides is described. The analysis of α-emitters is performed by isotope dilution α-spectrometry using242Pu or236Pu and243Am tracers. Strontium-90 is analyzed by liquid scintillation counting using the double energetic windows method. The method combines the well established, procedure for Pu analysis based on anion exchange, the powerful and selective method for Sr isolation based on extraction chromatography using Sr-Spec resin and finally it includes the application of the TRU-Spec column for separation and purification of the Am fraction. The radiochemical procedure was tested using IAEA reference and intercomparison materials. Major parameters of the procedure as well as advantages and drawbacks are discussed in detail.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02063661
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  • 5
    Electronic Resource
    Electronic Resource
    IAEA Programme of natural matrix reference materials for the determination of radionuclides (1993)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 345 (1993), S. 169-173 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The International Atomic Energy Agency has been providing analytical quality control services (AQCS) to its Member States since the 1960's. The AQCS programme distributes reference materials (RMs), organizes intercomparison runs, and provides training courses for quality assurance in chemical analysis and radioactivity measurements of food, biological, environmental and marine materials. This paper focusses on those aspects of the subject dealing with reference materials and intercomparison runs for the determination of radionuclides. Nineteen natural matrix reference materials are available for the determination of radionuclides. Twelve new intercomparison and reference materials are in preparation or under consideration. The radionuclides of interest include: K-40, Mn-54, Co-60, Sr-90, Tc-99, Ru-106, Ba-133, Cs-134, Cs-137, Pb-210, Ra-226, Th-228, Th-232, Pu-238, Pu-239+240.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00322582
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