Phys. Rev. C 71, 034310 (2005) [15 pages]

Self-consistent description of multipole strength in exotic nuclei: Method

Abstract

References

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J. Terasaki^1,2,3,4,*, J. Engel^1,†, M. Bender^5,‡, J. Dobaczewski^2,3,4,6,§, W. Nazarewicz^2,3,6,**, and M. Stoitsov^{2,3,4,7,††}
¹Department of Physics and Astronomy, CB3255, University of North Carolina, Chapel Hill, North Carolina 27599-3255
²Department of Physics and Astronomy,University of Tennessee, Knoxville, Tennessee 37996
³Physics Division, Oak Ridge National Laboratory,Post Office Box 2008, Oak Ridge, Tennessee 37831
⁴Joint Institute for Heavy-Ion Research, Oak Ridge, Tennessee 37831
⁵Physics Division, Argonne National Laboratory, Argonne, Illinois 60439
⁶Institute of Theoretical Physics, Warsaw University,ul. Hoża 69, 00-681 Warsaw, Poland
⁷Institute of Nuclear Research and Nuclear Energy,Bulgarian Academy of Science, Sofia 1784, Bulgaria

Received 27 July 2004; published 16 March 2005

We use the canonical Hartree-Fock-Bogoliubov basis to implement a self-consistent quasiparticle-random-phase approximation (QRPA) with arbitrary Skyrme energy density functionals and density-dependent pairing functionals. The point of the approach is to accurately describe multipole strength functions in spherical even-even nuclei, including weakly bound drip-line systems. We describe the method and carefully test its accuracy, particularly in handling spurious modes. To illustrate our approach, we calculate isoscalar and isovector monopole, dipole, and quadrupole strength functions in several Sn isotopes, both in the stable region and at the drip lines. We also investigate the consequences of neglecting the spin-orbit or Coulomb residual interactions in the QRPA.

URL:

http://link.aps.org/doi/10.1103/PhysRevC.71.034310

DOI:

10.1103/PhysRevC.71.034310

PACS:

21.30.Fe, 21.60.Jz, 24.30.Cz

^*Electronic address: jterasak@physics.unc.edu.

^†Electronic address: engelj@physics.unc.edu.

^‡Electronic address: mbender@phy.anl.gov.

^§Electronic address: dobaczew@fuw.edu.pl.

^**Electronic address: witek@utk.edu.

^††Electronic address: stoitsovmv@ornl.gov.

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Phys. Rev. C 71, 034310 (2005) [15 pages]

Self-consistent description of multipole strength in exotic nuclei: Method