Spin-Isospin Resonances and the Neutron Skin of Nuclei

Scientific paper - Original scientific paper

• Author: Dario Vretenar
• Author: Nils Paar
• Author: Tamara Nikšić
• 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 Gamow-Teller resonances (GTR) and isobaric analog states (IAS) of a sequence of even-even Sn target nuclei are calculated by using the framework of the relativistic Hartree-Bogoliubov model plus proton-neutron quasiparticle random-phase approximation. The calculation reproduces the experimental data on ground-state properties, as well as the excitation energies of the isovector excitations. It is shown that the isotopic dependence of the energy spacings between the GTR and IAS provides direct information on the evolution of neutron-skin thickness along the Sn isotopic chain. A new method is suggested for determining the difference between the radii of the neutron and proton density distributions along an isotopic chain, based on measurement of the excitation energies of the GTR relative to the IAS.

• Keywords (english): isobaric analogue states; nuclear isospin; tin; nuclear structure
• 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. 91, no. 26, 262502
• p-ISSN: 0031-9007
• e-ISSN: 1079-7114
• DOI: https://doi.org/10.1103/PhysRevLett.91.262502
• URN:NBN: urn:nbn:hr:217:916203
• Publication: 2003
• Document URL: http://link.aps.org/doi/10.1103/PhysRevLett.91.262502
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright (2003) by the American Physical Society.
• Created on: 2019-10-13 18:20:49