par Achakovskiy, O.;Avdeenkov, A.V.;Goriely, Stéphane 
;Kamerdzhiev, S.;Krewald, S.
Référence Physical review. C, Nuclear physics, 91, page (034620)
Publication Publié, 2015-03-31
;Kamerdzhiev, S.;Krewald, S.Référence Physical review. C, Nuclear physics, 91, page (034620)
Publication Publié, 2015-03-31
Article révisé par les pairs
| Résumé : | The pygmy dipole resonance and photon strength function in stable and unstable Ni and Sn isotopes are calculated within the microscopic self-consistent version of the extended theory of finite Fermi systems, which, in addition to the standard quasiparticle random-phase approximation approach, includes phonon coupling effects. The Skyrme force SLy4 is used. A pygmy dipole resonance in Ni72 is predicted at the mean energy of 12.4 MeV exhausting 25.7% of the total energy-weighted sum rule. The microscopically obtained photon E1 strength functions are compared with available experimental data and used to calculate nuclear reaction properties. Average radiative widths and radiative neutron capture cross sections have been calculated taking phonon coupling into account as well as uncertainties caused by various microscopic level density models. In all three quantities considered, the contribution of phonon coupling turned out to be significant and is found necessary to explain available experimental data. |
