Proton Electric Pygmy Dipole Resonance

Scientific paper - Original scientific paper

• Author: Nils Paar
• Author: Dario Vretenar
• Author: Peter Ring
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

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.

• Keywords (english): nuclear mass and neutron distributions; forces in hadronic systems and nuclear effective interactions; Hartree-Fock and random-phase approximations in nuclei; nuclear giant resonances
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review Letters
• Numbering: vol. 94, no. 18, 182501
• p-ISSN: 0031-9007
• e-ISSN: 1079-7114
• DOI: https://doi.org/10.1103/PhysRevLett.94.182501
• URN:NBN: urn:nbn:hr:217:409794
• Publication: 2005
• Document URL: http://link.aps.org/doi/10.1103/PhysRevLett.94.182501
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright (2005) by the American Physical Society.
• Created on: 2019-10-15 13:21:40