Proton Electric Pygmy Dipole Resonance

Paar, Nils and Vretenar, Dario and Ring, Peter (2005) Proton Electric Pygmy Dipole Resonance. Physical Review Letters, 94 (18). pp. 182501-4. ISSN 0031-9007

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Abstract

The evolution of the low-lying E1 strength in proton-rich nuclei is analyzed in the framework of the self-consistent relativistic Hartree-Bogoliubov model and the relativistic quasiparticle random-phase approximation (RQRPA). Model calculations are performed for a series of N=20 isotones and Z=18 isotopes. For nuclei close to the proton drip line, the occurrence of pronounced dipole peaks is predicted in the low-energy region below 10 MeV excitation energy. From the analysis of the proton and neutron transition densities and the structure of the RQRPA amplitudes, it is shown that these states correspond to the proton pygmy dipole resonance.

Item Type: Article
Keywords: nuclear mass and neutron distributions, forces in hadronic systems and nuclear effective interactions, Hartree-Fock and random-phase approximations in nuclei, nuclear giant resonances
Date: May 2005
Subjects: NATURAL SCIENCES > Physics > Nuclear Physics
Additional Information: Copyright (2005) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 0119250
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 24 May 2014 19:06
Last Modified: 24 May 2014 19:06
URI: http://digre.pmf.unizg.hr/id/eprint/1693

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