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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},
}