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The k0 and Q0 Values for the Zr-Isotopes: A Re-Investigation

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Abstract

The k 0 and Q 0 values for 94Zr(n,γ)95Zr(E γ = 724.2+756.7 keV) and 96Zr(n,γ)97Zr(β−) 97mNb (E γ = 743.4 keV) were re-investigated. The aim was to further improve the reliability of the neutron spectrum characterization (f and α monitoring) in k 0-NAA, based on "bare monitor" methods with the use of these Zr radionuclides. So as to achieve this goal, experimental determinations were performed in three reactor centers: KFKI AEKI, Budapest (WWR-M reactor); INW, Gent (THETIS reactor); SCK·CEN, Mol (BR1 reactor). The results were: Q 0(94Zr) = 5.306; Q 0(96Zr) = 251.6; k 0(95Zr, 724.2+756.7 keV) = 2.000E-4; k 0(97Zr/97mNb, 743.4 keV) = 1.237E-5. This means that the newly evaluated k 0-values are about 4.7% lower than the formerly reported ones. It is also emphasized that the 97Zr half-life is 16.74 hours, contrary to the ∼1% higher values usually reported.

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Authors and Affiliations

  1. MTA-KFKI-Atomic Energy Research Institute, H-1525, Budapest 114, P.O.Box 49, Hungary

    A. Simonits

  2. Laboratory of Analytical Chemistry, Institute for Nuclear Sciences, University of Gent, Proeftuinstraat 86, B-9000, Gent, Belgium

    F. De Corte

  3. Laboratory of Analytical Chemistry, Institute for Nuclear Sciences, University of Gent, Proeftuinstraat 86, B-9000, Gent, Belgium

    S. Van Lierde

  4. SCK·CEN, Belgian Nuclear Research Centre, Boeretang 200, B-2400, Mol, Belgium

    S. Pommé

  5. Institute for Reference Materials and Measurements, European Commission, Joint Research Centre, B-2440, Geel, Belgium

    P. Robouch & M. Eguskiza

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  1. A. Simonits
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  2. F. De Corte
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  3. S. Van Lierde
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  4. S. Pommé
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  5. P. Robouch
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  6. M. Eguskiza
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Simonits, A., De Corte, F., Van Lierde, S. et al. The k0 and Q0 Values for the Zr-Isotopes: A Re-Investigation. Journal of Radioanalytical and Nuclear Chemistry 245, 199–203 (2000). https://doi.org/10.1023/A:1006759516520

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