| Autor: |
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. |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. C 98, 054310 (2018) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevC.98.054310 |
| Popis: |
The photo-neutron cross sections of $^{162,163}\rm{Dy}$ have been measured for the first time in an energy region from the neutron threshold ($S_n$) up to $\approx$ $13$~MeV. The ($\gamma$,n) reaction was induced with quasi-monochromatic laser Compton-scattered $\gamma$ rays, produced at the NewSUBARU laboratory. The corresponding $\gamma$-ray strength functions ($\gamma$SF) have been calculated from the photo-neutron cross sections. The data are compared to reanalyzed $\gamma$SFs of $^{160-164}\rm{Dy}$, which are measured below $S_n$. The excellent agreement with the photo-neutron data at $S_n$ confirms the principle of detailed balance. Thus, a complete $\gamma$SF is established covering in total the energy region of 1 MeV $\leq$ E$_{\gamma}$ $\leq$ 13 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 ($\gamma,\gamma^\prime$) 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 $\gamma$SFs 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 $\gamma$SFs. |
| Databáze: |
arXiv |
| Externí odkaz: |
|
