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  1. No Access

    Article

    Instrumental neutron activation analysis of samples with volumes from 2 to 350 ml

    Usually neutron activation analyses are performed in point-source geometry. However, specially designed irradiation positions and carefully planned measuring conditions enabled the activation and analysis of s...

    R. Gwozdz in Journal of Radioanalytical and Nuclear Chemistry (2007)

  2. No Access

    Article

    Standardization problems in INAA of large organic samples

    For the practical application of large sample activation analysis, an extensive characterization of the irradiation facility and of the measurement system — of sample size, flux-gradient, maximum count rate, s...

    R. Gwozdz, F. Grass in Czechoslovak Journal of Physics (2006)

  3. No Access

    Article

    Standardization problems in INAA of large organic samples

    For the practical application of large sample activation analysis, an extensive characterization of the irradiation facility and of the measurement system — of sample size, flux-gradient, maximum count rate, s...

    R. Gwozdz, F. Grass in Czechoslovak Journal of Physics (2006)

  4. No Access

    Article

    Determination of some elements in Ageratum conyziodes,a tropical medicinal plant, using instrumental neutron activation analysis

    Instrumental neutron activation analysis was utilized for the multielemental determination of elements in the roots of Ageratum conyzoides, a tropical medicinal plant that is used locally for the cure of various ...

    L. A. Dim, I. I. Funtua, A. O. Oyewale… in Journal of Radioanalytical and Nuclear Che… (2004)

  5. No Access

    Article

    Contamination by human fingers: The Midas touch

    Anthropogenic activity is one of the causes of contamination in the human environment: contamination of air, water, top soils, plants and food products has complex effects on human health problems. Wear and ab...

    R. Gwozdz, F. Grass in Journal of Radioanalytical and Nuclear Chemistry (2004)

  6. No Access

    Chapter and Conference Paper

    Neutron Activation Analysis Of Large Samples Of Environmental And Biological Origin

    The environmental remediation programs in Kazakhstan require fast, viable and relatively cheap analytical control of thousands of samples of soils, plants, food products and materials from geological prospecti...

    R. Gwozdz, P. Chakrov, V. Solodukhin… in Environmental Protection Against Radioacti… (2003)

  7. No Access

    Article

    A gamma-spectrometry system for activation analysis

    Based on a Preloaded Digital Filter operating on a 20% n-type HpGe detector with transistor reset preamplifier, and on a software implementation of a loss-free counting MCA, storing immediately into the multi-...

    G. P. Westphal, H. Lemmel, F. Grass… in Journal of Radioanalytical and Nuclear Che… (2001)

  8. No Access

    Article

    Activation Analysis of Large Samples

    The usual mass of samples for activation analysis is in the range of several milligrams to several hundred milligrams. An improvement of the detection limit by three orders of magnitude is attainable by use of...

    R. Gwozdz, F. Grass in Journal of Radioanalytical and Nuclear Chemistry (2000)

  9. No Access

    Article

    High-Flux Irradiation of Open Samples

    The irradiation of large samples of biological material in a high neutron flux enables the extention of trace element analysis into the ng to pg range, but raises several problems as gamma heating and radiolys...

    J. Casta, R. Gwozdz, P. Katrik… in Journal of Radioanalytical and Nuclear Chemistry (2000)

  10. No Access

    Article

    Progress in Activation Analysis at the Atomic Institute Vienna

    Fields in which progress has been achieved at the Atomic Institute Vienna are discussed briefly. The use of short and medium lived nuclides for activation analysis (AA). Construction of out-core parts of a fas...

    F. Grass, K. Buchtela, T. Furch, R. Gwozdz… in Journal of Radioanalytical and Nuclear Che… (2000)

  11. No Access

    Chapter

    Activation Analysis of Large Volume Soil Extract Samples

    In the process of transferring stable and radioactive isotopes from soil to plants, a soil solution is the intermediate phase. A transfer coefficient from soil to plants can be divided into two separate distri...

    R. Gwozdz, F. Grass, G. Polikarpov… in Nuclear Physical Methods in Radioecologica… (2000)

  12. No Access

    Article

    Application of short-lived radionuclides in neutron activation analysis of biological and environmental samples

    The application of short-lived nuclides, especially in connection with the6LiD-converter, in biological and environmental samples is demonstrated on I and Br determination in human urine, on I in pet food, and on...

    F. Grass, M. Bichler, J. Dorner, H. Holzner… in Biological Trace Element Research (1994)

  13. No Access

    Chapter

    Application of Short-Lived Radionuclides in Neutron Activation Analysis of Biological and Environmental Samples

    The application of short-lived nuclides, especially in connection with the 6LiD-converter, in biological and environmental samples is demonstrated on I and Br determination in human urine, on I in pet food, and o...

    F. Grass, M Bichler, J. Dorner, H. Holzner… in Nuclear Analytical Methods in the Life Sci… (1994)

  14. No Access

    Article

    Fluorine analysis of standard materials by short-time activation analysis using20F

    Fluorine has been analyzed in the “Fast Irradiation and Measurement System” FIMS in the TRIGA Mark II reactor. The samples with weight ranging from 100 to 500 mg were irradiated and measured in 11 or 22 s peri...

    R. Gwozdz, F. Grass, J. Dorner in Journal of Radioanalytical and Nuclear Chemistry (1993)

  15. No Access

    Article

    Instrumental neutron activation analysis of samples with masses from micrograms to hectograms

    The rotating rig at the Danish DR-3 reactor was used for irradiation of samples with masses from a hundred micrograms to several hundred grams. The pneumatic post for uranium delayed neutron counting was used ...

    R. Gwozdz, H. J. Hansen, K. L. Rasmussen… in Journal of Radioanalytical and Nuclear Che… (1993)

  16. No Access

    Chapter and Conference Paper

    The diachronous C/T plankton extinction in the Danish Basin

    Hans J. Hansen, R. Gwozdz, Jens M. Hansen, Richard G. Bromley… in Global Bio-Events (1986)

  17. No Access

    Article

    Determination of lithium by instrumental neutron activation analysis

    The fast transfer system in the DR 2 reactor for irradiation at a thermal neutron flux density of 1013 n·cm−2·sec−1 was used for the determination of lithium by the7Li(n, γ)8Li reaction. β-counting with a large p...

    K. Heydorn, P. Z. Skanborg, R. Gwozdz… in Journal of Radioanalytical Chemistry (1977)