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

Yüksel E., Khan E., Bozkurt K.

NUCLEAR PHYSICS A, cilt.877, ss.35-50, 2012 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 877
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1016/j.nuclphysa.2012.01.006
  • Dergi Adı: NUCLEAR PHYSICS A
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.35-50
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

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. (C) 2012 Elsevier B.V. All rights reserved.