Zirconium as a multi-isotopic flux ratio monitor and a single comparator in reactor-neutron activation analysis

A. Simonits, F. De Corte, J. Hoste

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Different methods for the determination of thermal-to-epithermal neutron flux ratio are reviewed and nuclear data for commonly used monitor materials and for Zr isotopes are tabulated. It is shown that the use of the94Zr-96Zr isotope pair gives significant improvement in precision while measuring Φthe ratios in the 20<Φthe<200 range. When the single comparator method is applied, the use of the94Zr isotope is suggested as a comparator with the94Zr-96Zr isotope pair for simultaneous flux ratio determination. Theoretical calculations show that the Zr comparator-flux ratio monitor gives better precision and accuracy than does Ru for two-thirds of the isotopes used for analysis in well thermalized (Φthe>100) channels. The Ioth-values for the mentioned Zr isotopes have been experimentally determined and compared with previously published data.

Original languageEnglish
Pages (from-to)467-486
Number of pages20
JournalJournal of Radioanalytical Chemistry
Issue number2
Publication statusPublished - Sep 1976


ASJC Scopus subject areas

  • Molecular Medicine
  • Radiology Nuclear Medicine and imaging

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