Abstract
Excitation functions for the reactions89Y (p, n)89gZr and89Y (p, n)89mZr have been measured over the energy ranges from threshold to 15 MeV using stacked foil activation technique. The isomeric cross-section ratio σm/(σm+σg) for the formation of89m, gZr was determined. The excitation functions and isomeric cross-section ratios were calculated for the reactions89Y (p, γ)90m, gZr ,89Y (p, n)89m, gZr ,89Y (p, p)89m, gY and89Y (p, αn)85m, gSr also for energy range 4–40 MeV . The PE emission fraction is found to depend strongly on the energy of the incident particle. The isomeric cross-section ratio is found to depend strongly on the relative spins of the isomeric and ground state and some dependence on energy difference between the levels.
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