Measurements of the 89Y(n,γ)90mY cross-section in the neutron energy range of 13.5–14.6MeV

Abstract

Abstract The 89 Y(n,γ) 90m Y cross-section has been measured at three neutron energy points between 13.5 and 14.6 MeV using the activation technique and a coaxial HPGe γ-ray detector. The data for the 89 Y(n,γ) 90m Y cross-sections are reported to be 0.39 ± 0.02, 0.43 ± 0.02, and 0.38 ± 0.02 mb at 13.5 ± 0.2, 14.1 ± 0.1, and 14.6 ± 0.2 MeV incident neutron energies, respectively. The first data for the 89 Y(n,γ) 90m Y reaction at neutron energy points of 13.5 and 14.1 MeV are presented. The natural high-purity Y 2 O 3 powder was used as target material. The fast neutrons were produced by the T(d,n) 4 He reaction. Neutron energies were determined by the method of making cross-section ratios of 90 Zr(n,2n) 89m+g Zr and 93 Nb(n,2n) 92m Nb reactions, and the neutron fluencies were determined using the monitor reaction 93 Nb(n,2n) 92m Nb. The results obtained are compared with existing data.