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Employing the activation technique in combination with radiochemical separations and high-resolution γ-ray spectroscopy fission neutron spectrum averaged cross sections were measured for several ( n ,  p ) and ( n , α) reactions on isotopes of zirconium; our measurements constitute the first systematic study. The special interest was in the investigation of the  90 Zr( n ,  p ) 90 Y reaction for the production of no-carrier-added  90 Y in a nuclear reactor. At a fast neutron flux density of 7.5 × 10 13  cm −2  s −1  and an irradiation time of 120 h, using 100% enriched  90 Zr target 0.548 GBq of no-carrier-added  90 Y per batch could be produced. The method is thus suitable for medium-scale production of this radionuclide.

radiochimica acta

Measurement of fission neutron spectrum averaged cross sections of some threshold reactions on zirconium: Production possibility of no-carrier-added  90 Y in a nuclear reactor