Toroidal, compression, and vortical dipole strengths in 144-154Sm: Skyrme-RPA exploration of the deformation effect

Kvasil J, Nesterenko VO, Kleinig W, Bozik D, Reinhard PG, Lo Iudice N (2013)

Publication Type: Journal article

Publication year: 2013

Journal

European Physical Journal A EDP Sciences: EPJ

Book Volume: 49

Pages Range: 1-13

Article Number: 119

Journal Issue: 9

DOI: 10.1140/epja/i2013-13119-3

Abstract

A comparative analysis of toroidal, compressional and vortical dipole strengths in the spherical ¹⁴⁴Sm and the deformed ¹⁵⁴Sm is performed within the random-phase approximation using a set of different Skyrme forces. Isoscalar (T = 0), isovector (T = 1), and electromagnetic excitation channels are considered. The role of the nuclear convection jcon and magnetization jmag currents is inspected. It is shown that the deformation leads to an appreciable redistribution of the strengths and causes a spectacular deformation splitting (exceeding 5 MeV) of the isoscalar compressional mode. When stepping from ¹⁴⁴Sm to ¹⁵⁴Sm, we observe an increase of the toroidal, compression and vortical contributions in the low-energy region (often called pygmy resonance). The strength in this region seems to be an overlap of various excitation modes. The energy centroids of the strengths depend significantly on the isoscalar effective mass m0. Skyrme forces with a large m0 (typically m0/m ≈ 0.8-1) seem to be more suitable for the description of experimental data for the isoscalar giant dipole resonance. © Società Italiana di Fisica / Springer-Verlag 2013.

Authors with CRIS profile

Paul-Gerhard Reinhard Naturwissenschaftliche Fakultät

Involved external institutions

Univerzita Karlova v Praze / Charles University in Prague

Czech Republic (CZ) Joint Institute for Nuclear Research (JINR) / Объединённый институт ядерных исследований (ОИЯИ)

Russian Federation (RU) Università degli Studi di Napoli Federico II

Italy (IT)

How to cite

APA:

Kvasil, J., Nesterenko, V.O., Kleinig, W., Bozik, D., Reinhard, P.-G., & Lo Iudice, N. (2013). Toroidal, compression, and vortical dipole strengths in 144-154Sm: Skyrme-RPA exploration of the deformation effect. European Physical Journal A, 49(9), 1-13. https://doi.org/10.1140/epja/i2013-13119-3

MLA:

Kvasil, J., et al. "Toroidal, compression, and vortical dipole strengths in 144-154Sm: Skyrme-RPA exploration of the deformation effect." European Physical Journal A 49.9 (2013): 1-13.

BibTeX: Download