The recovery of oxygen bearing vanadium between 150 and 500°K after neutron irradiation at 80°K was studied. Vanadium wires containing 250 to 2500 atomic parts per million oxygen were irradiated to fast neutronfluences of 0.35, 1.2 and 2.7 x 18n/cm2(E > 1 MeV). The recovery of irradiation-induced damage was followed by means of measurements of electrical resistance and low frequency internal friction. To quantita-tively measure the concentration of oxygen in solid solution a specific resistivity was determined with respect to its relaxation strength, which in turn was calibrated by vacuum fusion analysis. Irradiation-induced damage was found to increase with neutron fluence and impurity content.
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