Abrahams, Kenzo JIngeberg, Vetle WegnerSiem, Sunniva2026-01-132026-01-132025Ingeberg, V.W., Siem, S., Wiedeking, M., Choplin, A., Goriely, S., Siess, L., Abrahams, K.J., Arnswald, K., Bello Garrote, F., Bleuel, D.L. and Cederkäll, J., 2025. Nuclear level density and γ-ray strength function of Ni 67 and the impact on the i process. Physical Review C, 111(1), p.015803.https://doi.org/10.1103/PhysRevC.111.015803https://hdl.handle.net/10566/21686Proton-γ coincidences from (d,p) reactions between a Ni66 beam and a deuterated polyethylene target have been analyzed with the inverse-Oslo method to find the nuclear level density (NLD) and γ-ray strength function (γSF) of Ni67. The Ni66(n,γ) capture cross section has been calculated using the Hauser-Feshbach model in TALYS using the measured NLD and γSF as constraints. The results confirm that the Ni66(n,γ) reaction acts as a bottleneck when relying on one-zone nucleosynthesis calculations. However, the impact of this reaction is strongly dampened in multizone models of low-metallicity AGB stars experiencing i-process nucleosynthesis.enNuclearLevel DensityNuclear Reaction RatesGamma Ray Strength FunctionsNuclear AstrophysicsArticle