par Utsunomiya, Hiroaki;Renstrøm, Therese;Tveten, G.M.;Goriely, Stéphane ;Katayama, Seitarou;Ari-Izumi, T.;Takenaka, D.;Symochko, D.;Kheswa, B.V.;Ingeberg, V. W.;Glodariu, Tudor;Lui, Yiu-Wing;Miyamoto, Syuji;Larsen, Ann-Cecilie;Midtbø, J.E.;Görgen, Andreas;Siem, Sunniva;Campo, Crespo L.C.;Guttormsen, Magne;Hilaire, Stéphane;Péru, S.;Koning, Arjan J.
Référence Physical Review C, 98, 5, 054619
Publication Publié, 2018-11-01
Référence Physical Review C, 98, 5, 054619
Publication Publié, 2018-11-01
Article révisé par les pairs
Résumé : | Photoneutron cross sections were measured for Ni58,Ni60,Ni61, and Ni64 at energies between the one-neutron and two-neutron thresholds using quasimonochromatic γ-ray beams produced in laser Compton scattering at the NewSUBARU synchrotron radiation facility. These photoneutron data are used to extract the γ-ray strength function above the neutron threshold, complementing the information obtained by the Oslo method below the threshold. We discuss radiative neutron-capture cross sections and the Maxwellian-averaged cross sections for Ni isotopes including Ni63, a branching point nucleus along the weak s-process path. The cross sections are calculated with the experimentally constrained γ-ray strength functions from the Hartree-Fock-Bogolyubov plus quasiparticle-random-phase approximation based on the Gogny D1M interaction for both E1 and M1 components and supplemented with the M1 upbend. |