Analysis of the neutron and proton contributions to the pygmy dipole mode in doubly magic nuclei

作者：Yuksel E; Khan E^*; Bozkurt K

来源：Nuclear Physics A, 2012, 877: 35-50.

DOI：10.1016/j.nuclphysa.2012.01.006

• Giant resonances
• Pygmy dipole mode
• RPA

The electric dipole excitations are investigated in the framework of the self-consistent HF + RPA approximation with Skyrme interactions. Magic O, Ca, Ni and Sn isotopes are used to investigate low-lying modes. Neutron and proton transition densities analysis of each nucleus is provided to examine the behavior of Pygmy Dipole Resonance (PDR) of nuclei under excitation, showing a complex pattern along the nuclear chart. The PDR in the very neutron-rich Ca-70 nucleus exhibits a novel mode of excitation, the so-called arch mode. The collectivity of the PDR is also analysed.

• 出版日期2012-3-1