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@ARTICLE{Speth:888647,
      author       = {Speth, Josef and Reinhard, P. G. and Tselyaev, Victor and
                      Lyutorovich, Nikolay},
      title        = {{G}eneralized {S}kyrme random-phase approximation for
                      nucler resonances: {D}ifferent trends for electric and
                      magnetic modes},
      journal      = {Physical review / C},
      volume       = {102},
      number       = {5},
      issn         = {2469-9985},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2020-05090},
      pages        = {054332},
      year         = {2020},
      abstract     = {We discuss major differences between electric and magnetic
                      excitations in nuclei appearing in self-consistent
                      calculations based on Skyrme energy-density functionals
                      (EDFs). For this we calculate collective low- and high-lying
                      electric and magnetic excitations in 208Pb within a
                      self-consistent Skyrme EDF approach using the random-phase
                      approximation (RPA) and a more sophisticated particle-hole
                      plus phonon-coupling model, coined the time-blocking
                      approximation (TBA). Tools of analysis are Landau-Migdal
                      parameters for bulk properties and the RPA and TBA results
                      for finite nuclei. We show that the interplay between the
                      effective mass and the effective particle-hole interaction,
                      well known in the Landau-Migdal theory, renders the final
                      results rather independent of the effective mass by virtue
                      of the “backflow effect.” It explains the success of
                      self-consistent calculations of electric transitions in such
                      approaches. This effect, however, is absent in the magnetic
                      case and leads to higher fluctuations in the results. It
                      calls for further developments of the Skyrme functional in
                      the spin channel.},
      cin          = {IAS-4 / IKP-3},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-4-20090406 / I:(DE-Juel1)IKP-3-20111104},
      pnm          = {511 - Computational Science and Mathematical Methods
                      (POF3-511)},
      pid          = {G:(DE-HGF)POF3-511},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000595152800004},
      doi          = {10.1103/PhysRevC.102.054332},
      url          = {https://juser.fz-juelich.de/record/888647},
}