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  • 1 State University Institute for Nuclear Sciences Proeftuinstraat 86 B-9000 Gent (Belgium)
  • | 2 Central Research Institute for Physics P. O. B. 49 H-1525 Budapest 114 (Hungary)
  • | 3 Research Associate of the National Fund for Scientific Research Belgium
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Abstract  

The effective resonance energy
\documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{upgreek} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} $$\left( {\bar E_r } \right)$$ \end{document}
, a useful parameter when correcting the resonance integral for a non-ideal epithermal neutron flux distribution, can be experimentally determined by coirradiating the investigated isotope with a comparator isotope whose effective resonance energy is accurately known. The principle of the method is outlined and the error propagation functions are studies in detail. The usefulness of the
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-comparator technique is tested for a few isotopes.