Abstract
The photoneutron cross sections of have been measured for the first time in an energy region from the neutron threshold () up to . The reaction was induced with quasimonochromatic laser Compton-scattered rays, produced at the NewSUBARU laboratory. The corresponding -ray strength functions () have been calculated from the photoneutron cross sections. The data are compared to reanalyzed of , which are measured below . The excellent agreement with the photoneutron data at confirms the principle of detailed balance. Thus, a complete is established covering in total the energy region of MeV. These mid-shell well-deformed dysprosium isotopes all show scissors resonances with very similar structures. We find that our data predict the same integrated scissors strength as 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 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 .
6 More- Received 17 February 2018
DOI:https://doi.org/10.1103/PhysRevC.98.054310
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