Anti-analog giant dipole resonances and the neutron skin of nuclei

A. Krasznahorkay, N. Paar, D. Vretenar, M. N. Harakeh

Research output: Contribution to journalArticle

12 Citations (Scopus)


We examine a method to determine the neutron-skin thickness of nuclei using data on the charge-exchange anti-analog giant dipole resonance (AGDR). Calculations performed using the relativistic proton-neutron quasiparticle random-phase approximation (pn-RQRPA) reproduce the isotopic trend of the excitation energies of the AGDR, as well as that of the spin-flip giant dipole resonances (IVSGDR), in comparison to available data for the even-even isotopes 112-124Sn. It is shown that the excitation energies of the AGDR, obtained using a set of density-dependent effective interactions which span a range of the symmetry energy at saturation density, supplemented with the experimental values, provide a stringent constraint on value of the neutron-skin thickness. For 124Sn, in particular, we determine the value δRpn=0.21±0.05 fm. The result of the present study shows that a measurement of the excitation energy of the AGDR in (p, n) reactions using rare-isotope beams in inverse kinematics, provides a valuable method for the determination of neutron-skin thickness in exotic nuclei.

Original languageEnglish
Pages (from-to)428-432
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number4-5
Publication statusPublished - Mar 26 2013


  • Giant dipole resonances
  • Neutron-skin thickness
  • Rare-isotope beams
  • Relativistic random-phase approximation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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