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

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 70Ca nucleus exhibits a novel mode of excitation, the so-called arch mode. The collectivity of the PDR is also analysed.
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http://hal.in2p3.fr/in2p3-00701476
Contributor : Sophie Heurteau <>
Submitted on : Friday, May 25, 2012 - 2:40:27 PM
Last modification on : Wednesday, September 16, 2020 - 3:59:20 PM

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E. Yüksel, E. Khan, K. Bozkurt. Analysis of the neutron and proton contributions to the pygmy dipole mode in doubly magic nuclei. Nuclear Physics A, Elsevier, 2012, 877, pp.35-50. ⟨10.1016/j.nuclphysa.2012.01.006⟩. ⟨in2p3-00701476⟩

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