Study of 179 Hf m 2 excitation

Isomeric ratios of 179Hf m2,g yields in the (γ, n) reaction and the cross section for the 179Hf m2 population in the (α, p) reaction are measured for the first time at the end-point energies of 15.1 and 17.5 MeV for bremsstrahlung photons and 26 MeV for alpha particles. The results are σ = (1.1 ± 0.11) × 10−27 cm2 for the 176Lu(α, p)179Hf m2 reaction and Y m2/Y g = (6.1 ± 0.3) × 10−6 and (3.7 ± 0.2) × 10−6 for the 180Hf(γ, n)179Hf m22 reaction at Е ep =15.1 and 17.5 MeV, respectively. The experimental data on the relative 179Hf m2 yield indicate a single-humped shape of the excitation function for the 180Hf(γ, n)179Hf m2 reaction. Simulation is performed using the TALYS-1.4 and EMPIRE-3.2 codes.