prikaz prve stranice dokumenta Relativistic RPA plus phonon-coupling analysis of pygmy dipole resonances
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Scientific paper - Original scientific paper
Relativistic RPA plus phonon-coupling analysis of pygmy dipole resonances
Physics Letters B, 647 (2007), 2-3; 111-117. https://doi.org/10.1016/j.physletb.2007.01.056
Litvinova, E.; Ring, Peter; Vretenar, Dario

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Litvinova, E., Ring, P. & Vretenar, D. (2007). Relativistic RPA plus phonon-coupling analysis of pygmy dipole resonances. Physics Letters B, 647. (2-3), 111-117. doi: 10.1016/j.physletb.2007.01.056

Litvinova, E., et al. "Relativistic RPA plus phonon-coupling analysis of pygmy dipole resonances." Physics Letters B, vol. 647, no. 2-3, 2007, pp. 111-117. https://doi.org/10.1016/j.physletb.2007.01.056

Litvinova, E., Peter Ring and Dario Vretenar. "Relativistic RPA plus phonon-coupling analysis of pygmy dipole resonances." Physics Letters B 647, no. 2-3 (2007): 111-117. https://doi.org/10.1016/j.physletb.2007.01.056

Litvinova, E., Ring, P. and Vretenar, D. (2007) 'Relativistic RPA plus phonon-coupling analysis of pygmy dipole resonances', Physics Letters B, 647(2-3), pp. 111-117. doi: 10.1016/j.physletb.2007.01.056

Litvinova E, Ring P, Vretenar D. Relativistic RPA plus phonon-coupling analysis of pygmy dipole resonances. Physics Letters B [Internet]. 2007 [cited 2024 December 21];647(2-3):111-117. doi: 10.1016/j.physletb.2007.01.056

E. Litvinova, P. Ring and D. Vretenar, "Relativistic RPA plus phonon-coupling analysis of pygmy dipole resonances", Physics Letters B, vol. 647, no. 2-3, pp. 111-117, 2007. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:145549. [Accessed: 21 December 2024]

Metadata
Title (english)Relativistic RPA plus phonon-coupling analysis of pygmy dipole resonances
AuthorE. Litvinova
AuthorPeter Ring
AuthorDario Vretenar
Author's institutionUniversity of Zagreb
Faculty of Science
(Department of Physics)
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Abstract (english)
The relativistic random-phase approximation (RRPA) plus phonon-coupling (PC) model is applied in the analysis of E1 strength distributions in 208Pb and 132Sn, for which data on pygmy dipole resonances (PDR) have recently been reported. The covariant response theory is fully consistent: the effective nuclear interaction NL3 is used both to calculate the spectrum of single-nucleon Dirac states, and as the residual interaction which determines the collective phonon states in the relativistic RPA. It is shown that the picture of the PDR as a resonant oscillation of the neutron skin against the isospin saturated proton–neutron core, and with the corresponding RRPA state characterized by a coherent superposition of many neutron particle–hole configurations, remains essentially unchanged when particle–vibration coupling is included. The effect of two-phonon admixtures is a weak fragmentation and a small shift of PDR states to lower excitation energy. Even though the PDR calculated in the extended model space of ph⊗phonon configurations contains sizeable two-phonon admixtures, it basically retains a one-phonon character and its dynamics is not modified by the coupling to low-lying surface vibrations.
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titlePhysics Letters B
Numberingvol. 647, no. 2-3, pp. 111-117
p-ISSN0370-2693
DOIhttps://doi.org/10.1016/j.physletb.2007.01.056
URN:NBNurn:nbn:hr:217:145549
Publication2007
ProjectNumber: 119-1191005-1010
Title (croatian): Nuklearna struktura i nuklearna astrofizika
Leader: Dario Vretenar
Jurisdiction: Croatia
Funding stream: ZP
Document URLhttp://dx.doi.org/10.1016/j.physletb.2007.01.056
Type of resourceText
Access conditionsOpen access
Terms of useLicence Attribution 3.0 Unported (CC BY 3.0) icon
Public noteReceived 25 July 2006, Revised 16 January 2007, Accepted 18 January 2007, Available online 16 February 2007. Published 5 April 2007. Under a Creative Commons license.
Created on2019-10-16 15:07:21