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Excited-state density distributions in neutron-rich nuclei

J. Terasaki

J. Engel

  • Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599-3255, USA and School of Physics, Peking University, Beijing 100871, People's Republic of China

  • Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599-3255, USA

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Phys. Rev. C 76, 044320 – Published 23 October, 2007

DOI: https://doi.org/10.1103/PhysRevC.76.044320

Abstract

We calculate densities of excited states in the quasiparticle random-phase approximation (QRPA) with Skyrme interactions and volume pairing. We focus on low-energy peaks/bumps in the strength functions of a range of Ca, Ni, and Sn isotopes for Jπ=0+,1−, and 2+. We define an “emitted-neutron number,” which we then use to distinguish localized states from scattering-like states. The degree of delocalization either increases as the neutron-drip line is approached or stays high between the stability line and the drip line. In the 2+ channel of Sn, however, the low-lying states, not even counting surface vibrations, are still fairly well localized on average, even at the neutron drip line.

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Phys. Rev. C 76, 044320– Published 23 October, 2007
  • Received 31 July 2006

© 2007 American Physical Society

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