Spin-Isospin Resonances and the Neutron Skin of Nuclei

Vretenar, Dario and Paar, Nils and Nikšić, Tamara and Ring, Peter (2003) Spin-Isospin Resonances and the Neutron Skin of Nuclei. Physical Review Letters, 91 (26). pp. 262502-4. ISSN 0031-9007

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Abstract

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.

Item Type: Article
Keywords: isobaric analogue states ; nuclear isospin ; tin ; nuclear structure
Date: December 2003
Subjects: NATURAL SCIENCES > Physics > Nuclear Physics
Additional Information: Copyright (2003) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119250
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 23 May 2014 10:51
Last Modified: 23 May 2014 10:51
URI: http://digre.pmf.unizg.hr/id/eprint/1642

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