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Extended Skyrme interaction in the spin channel

Abstract : Most of the Skyrme interactions are known to predict spin or isospin instabilities beyond the saturation density of nuclear matter which contradict predictions based on realistic interactions. A modification of the standard Skyrme interaction is proposed so that the ferromagnetic instability is removed. The new terms are density dependent and modify only the spin p-h interaction in the case of spin-saturated system. We have shown that these new terms change the total binding energy of odd-nuclei by only few tenths of keV. From the analysis of the spin instabilities of nuclear matter, restrictions on the parameters governing the spin-density dependent terms are evaluated. We conclude that with the extended Skyrme interaction, the Landau parameters G0 and could be tuned with a large flexibility without changing the ground-state properties in nuclei and in nuclear matter.
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http://hal.in2p3.fr/in2p3-00495893
Contributor : Sophie Heurteau <>
Submitted on : Tuesday, June 29, 2010 - 11:02:45 AM
Last modification on : Wednesday, September 16, 2020 - 4:08:31 PM

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J. Margueron, S. Goriely, M. Grasso, G. Colo, H. Sagawa. Extended Skyrme interaction in the spin channel. International Symposium Forefronts of Researches in Exotic Nuclear Structures, Mar 2010, Niigata, Japan. pp.1771-1774, ⟨10.1142/S0217732310000290⟩. ⟨in2p3-00495893⟩

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