Spin-flip M1 giant resonance as a challenge for Skyrme forces
Abstract
Despite a great success of the Skyrme mean-field approach in exploration of nuclear dynamics, it seems to fail in description of the spin-flip M1 giant resonance. The results for different Skyrme parameterizations are contradictory and poorly agree with experiment. In particular, there is no parameterization which simultaneously describes the one-peak gross structure of M1 strength in doubly magic nuclei and two-peak structure in heavy deformed nuclei. The reason of this mismatch could lie in an unsatisfactory treatment of spin correlations and spin-orbit interaction. We discuss the present status of the problem and possible ways of its solution. In particular, we inspect i) the interplay of the collective shift and spin-orbit splitting, ii) the isovector M1 response versus isospin-mixed responses, and iii) the role of tensor and isovector spin-orbit interaction.
Keywords
Cite
@article{arxiv.1001.3965,
title = {Spin-flip M1 giant resonance as a challenge for Skyrme forces},
author = {V. O. Nesterenko and J. Kvasil and P. Vesely and W. Kleinig and P. -G. Reinhard and V. Yu. Ponomarev},
journal= {arXiv preprint arXiv:1001.3965},
year = {2014}
}
Comments
8 pages, 5 figures, to be published in J. Phys. G, special issue on Open Problems in Nuclear Structure Theory (OPeNST)