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  • Verification of detailed ba...
    Renstrøm, T.; Utsunomiya, H.; Nyhus, H. T.; Larsen, A. C.; Guttormsen, M.; Tveten, G. M.; Filipescu, D. M.; Gheorghe, I.; Goriely, S.; Hilaire, S.; Lui, Y.-W.; Midtbø, J. E.; Péru, S.; Shima, T.; Siem, S.; Tesileanu, O.

    Physical review. C, 11/2018, Letnik: 98, Številka: 5
    Journal Article

    The photoneutron cross sections of 162,163Dy have been measured for the first time in an energy region from the neutron threshold (Sn) up to ≈13MeV. The (γ,n) reaction was induced with quasimonochromatic laser Compton-scattered γ rays, produced at the NewSUBARU laboratory. The corresponding γ -ray strength functions (γ SF) have been calculated from the photoneutron cross sections. The data are compared to reanalyzed γSFs of 160–164Dy, which are measured below Sn. The excellent agreement with the photoneutron data at Sn confirms the principle of detailed balance. Thus, a complete γ SF is established covering in total the energy regionof1 Eγ 13MeV.Thesemid-shellwell-deformeddysprosiumisotopesallshowscissorsresonances with very similar structures. We find that our data predict the same integrated scissors strength as (γ,γ′) data when integrated over the same energy range, which shows that the scissors mode very likely is consistent with the generalized Brink hypothesis. Finally, using the γSFs as input in the reaction code TALYS, we have deduced radiative neutron-capture cross sections and compared them to direct measurements. We find a very good agreement within the uncertainties, which gives further support to the experimentally determined γ SFs.