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Low-Lying Electric Dipole Transitions in Tin Isotopic Chain within the RPA Model

Abstract : A nuclear structuremodel based on a finite rank approximation of Skyrme interaction is applied to calculate the distribution of dipole strength in tin isotopes. The model is based on the quasiparticle random phase approximation. The results obtained with the three types of parametrizations of the Skyrme forces (SLy4, SkM∗, and SIII) are compared. The low-lying part of dipole strength distribution reveals the existence of a group of slightly collective states, and the corresponding E1 transition strength increases with the enlargement of neutron excess. The group is associated with the pygmy resonance.
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http://hal.in2p3.fr/in2p3-00212302
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Submitted on : Tuesday, January 22, 2008 - 4:51:03 PM
Last modification on : Wednesday, September 16, 2020 - 4:00:58 PM

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D. Tarpanov, C. Stoyanov, N. van Giai, V. V. Voronov. Low-Lying Electric Dipole Transitions in Tin Isotopic Chain within the RPA Model. International Conference on Nucler Structure and Related Topics, NSRT 06, Jun 2006, Dubna, Russia. pp.1402-1406, ⟨10.1134/S1063778807080133⟩. ⟨in2p3-00212302⟩

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