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, vol.877, pp.35-50, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 877
  • Publication Date: 2012
  • Doi Number: 10.1016/j.nuclphysa.2012.01.006
  • Journal Name: NUCLEAR PHYSICS A
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.35-50
  • Yıldız Technical University Affiliated: Yes

Abstract

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.