Neutron capture measurements on radioactive Zr-93

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Neutron Cross Sections, Radioactive Isotopes, Zirconium Isotopes, Neutron Spectra, Resonance

Scientific paper

Neutron capture measurements made on a sample of fission-product zirconium containing 20 percent Zr-93 (half-life = 1.5 million years) are reported. The measurements resulted in the identification of 138 resonance peaks for the Zr-93 isotope at neutron energies up to 21.5 keV. The study probably satisfies the formal requests (IAEA, 1983) for better than 20 percent and better than 30 percent accuracy. All but one of the 138 resonances parameterized were previously unknown. Average capture cross sections up to 300 keV could be compared only to earlier theoretical calculations.

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