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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F13%3A10191514%21RIV14-GA0-11320___
rdf:type
skos:Concept n17:Vysledek
rdfs:seeAlso
http://dx.doi.org/10.1103/PhysRevC.87.024305
dcterms:description
The nature of E1 low-energy strength (LES), often denoted as a %22pygmy dipole resonance%22, is analyzed within the random-phase approximation (RPA) in Pb-208 using Skyrme forces in a fully self-consistent manner. A first overview is given by the strength functions for the dipole, compressional, and toroidal operators. More detailed insight is gained by averaged transition densities and currents where the latter provide a very illustrative flow pattern. The analysis reveals clear isoscalar toroidal flow in the low-energy bin 6.0-8.8 MeV of the LES and a mixed isoscalar/isovector toroidal/compression flow in the higher bin 8.8-10.5 MeV. Thus the modes covered by LES embrace both vortical and irrotational motion. The simple collective picture of the LES as a %22pygmy%22 mode (oscillations of the neutron excess against the nuclear core) is not confirmed. DOI: 10.1103/PhysRevC.87.024305 The nature of E1 low-energy strength (LES), often denoted as a %22pygmy dipole resonance%22, is analyzed within the random-phase approximation (RPA) in Pb-208 using Skyrme forces in a fully self-consistent manner. A first overview is given by the strength functions for the dipole, compressional, and toroidal operators. More detailed insight is gained by averaged transition densities and currents where the latter provide a very illustrative flow pattern. The analysis reveals clear isoscalar toroidal flow in the low-energy bin 6.0-8.8 MeV of the LES and a mixed isoscalar/isovector toroidal/compression flow in the higher bin 8.8-10.5 MeV. Thus the modes covered by LES embrace both vortical and irrotational motion. The simple collective picture of the LES as a %22pygmy%22 mode (oscillations of the neutron excess against the nuclear core) is not confirmed. DOI: 10.1103/PhysRevC.87.024305
dcterms:title
Toroidal nature of the low-energy E1 mode Toroidal nature of the low-energy E1 mode
skos:prefLabel
Toroidal nature of the low-energy E1 mode Toroidal nature of the low-energy E1 mode
skos:notation
RIV/00216208:11320/13:10191514!RIV14-GA0-11320___
n17:predkladatel
n18:orjk%3A11320
n3:aktivita
n14:P n14:I n14:Z
n3:aktivity
I, P(GA13-07117S), Z(MSM0021620859)
n3:cisloPeriodika
2
n3:dodaniDat
n4:2014
n3:domaciTvurceVysledku
n10:8940991 n10:8850836
n3:druhVysledku
n16:J
n3:duvernostUdaju
n20:S
n3:entitaPredkladatele
n11:predkladatel
n3:idSjednocenehoVysledku
111296
n3:idVysledku
RIV/00216208:11320/13:10191514
n3:jazykVysledku
n12:eng
n3:klicovaSlova
neutron; nuclei; sum-rules; dipole mode
n3:klicoveSlovo
n9:sum-rules n9:neutron n9:nuclei n9:dipole%20mode
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[573EEB8817E1]
n3:nazevZdroje
Physical Review C - Nuclear Physics
n3:obor
n19:BG
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
4
n3:projekt
n15:GA13-07117S
n3:rokUplatneniVysledku
n4:2013
n3:svazekPeriodika
87
n3:tvurceVysledku
Reinhard, P. -G. Nesterenko, V. O. Kvasil, Jan Repko, Anton
n3:wos
000314684000003
n3:zamer
n8:MSM0021620859
s:issn
0556-2813
s:numberOfPages
6
n22:doi
10.1103/PhysRevC.87.024305
n6:organizacniJednotka
11320