prikaz prve stranice dokumenta Low-energy isovector and isoscalar dipole response in neutron-rich nuclei
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Scientific paper - Original scientific paper
Low-energy isovector and isoscalar dipole response in neutron-rich nuclei
Physical Review C - Nuclear Physics, 85 (2012), 4; 044317. https://doi.org/10.1103/PhysRevC.85.044317
Vretenar, Dario; Niu, Y. F.; Paar, Nils; Meng, Jie

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Vretenar, D., Niu, Y. F., Paar, N. & Meng, J. (2012). Low-energy isovector and isoscalar dipole response in neutron-rich nuclei. Physical Review C - Nuclear Physics, 85. (4). doi: 10.1103/PhysRevC.85.044317

Vretenar, Dario, et al. "Low-energy isovector and isoscalar dipole response in neutron-rich nuclei." Physical Review C - Nuclear Physics, vol. 85, no. 4, 2012. https://doi.org/10.1103/PhysRevC.85.044317

Vretenar, Dario, Y. F. Niu, Nils Paar and Jie Meng. "Low-energy isovector and isoscalar dipole response in neutron-rich nuclei." Physical Review C - Nuclear Physics 85, no. 4 (2012). https://doi.org/10.1103/PhysRevC.85.044317

Vretenar, D., et al. (2012) 'Low-energy isovector and isoscalar dipole response in neutron-rich nuclei', Physical Review C - Nuclear Physics, 85(4). doi: 10.1103/PhysRevC.85.044317

Vretenar D, Niu YF, Paar N, Meng J. Low-energy isovector and isoscalar dipole response in neutron-rich nuclei. Physical Review C - Nuclear Physics [Internet]. 2012 [cited 2024 December 30];85(4). doi: 10.1103/PhysRevC.85.044317

D. Vretenar, Y. F. Niu, N. Paar and J. Meng, "Low-energy isovector and isoscalar dipole response in neutron-rich nuclei", Physical Review C - Nuclear Physics, vol. 85, no. 4, 2012. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:912983. [Accessed: 30 December 2024]

Metadata
Title (english)Low-energy isovector and isoscalar dipole response in neutron-rich nuclei
AuthorDario Vretenar
AuthorY. F. Niu
AuthorNils Paar
AuthorJie Meng
Author's institutionUniversity of Zagreb
Faculty of Science
(Department of Physics)
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Abstract (english)
The self-consistent random-phase approximation, based on the framework of relativistic energy density functionals, is employed in the study of isovector and isoscalar dipole response in 68Ni, 132Sn, and 208Pb. The evolution of pygmy dipole states (PDSs) in the region of low excitation energies is analyzed as a function of the density dependence of the symmetry energy for a set of relativistic effective interactions. The occurrence of PDSs is predicted in the response to both the isovector and the isoscalar dipole operators, and its strength is enhanced with the increase in the symmetry energy at saturation and the slope of the symmetry energy. In both channels, the PDS exhausts a relatively small fraction of the energy-weighted sum rule but a much larger percentage of the inverse energy-weighted sum rule. For the isovector dipole operator, the reduced transition probability B(E1) of the PDSs is generally small because of pronounced cancellation of neutron and proton partial contributions. The isoscalar-reduced transition amplitude is predominantly determined by neutron particle-hole configurations, most of which add coherently, and this results in a collective response of the PDSs to the isoscalar dipole operator.
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titlePhysical Review C - Nuclear Physics
Numberingvol. 85, no. 4, 044317
p-ISSN0556-2813
e-ISSN1089-490X
DOIhttps://doi.org/10.1103/PhysRevC.85.044317
URN:NBNurn:nbn:hr:217:912983
Publication2012
ProjectNumber: 119-1191005-1010
Title (croatian): Nuklearna struktura i nuklearna astrofizika
Leader: Dario Vretenar
Jurisdiction: Croatia
Funding stream: ZP
Document URLhttp://link.aps.org/doi/10.1103/PhysRevC.85.044317
Type of resourceText
Access conditionsOpen access
Terms of useLicence In copyright icon
Public noteCopyright (2012) by the American Physical Society. Received 24 February 2012; revised manuscript received 2 April 2012; published 17 April 2012.
Created on2019-11-16 10:53:03