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Linear response in infinite nuclear matter as a tool to reveal finite size instabilities

By A. Pastore, K. Bennaceur, D. Davesne and J. Meyer

Abstract

Nuclear effective interactions are often modelled by simple analytical expressions such as the Skyrme zero-range force. This effective interaction depends on a limited number of parameters that are usually fitted using experimental data obtained from doubly magic nuclei. It was recently shown that many Skyrme functionals lead to the appearance of instabilities, in particular when symmetries are broken, for example unphysical polarization of odd-even or rotating nuclei. In this article, we show how the formalism of the linear response in infinite nuclear matter can be used to predict and avoid the regions of parameters that are responsible for these unphysical instabilities.Comment: Based on talk presented at 18th Nuclear Physics Workshop "Maria and Pierre Curie", 2011, Kazimierz, Polan

Topics: Nuclear Theory
Publisher: 'World Scientific Pub Co Pte Lt'
Year: 2011
DOI identifier: 10.1142/S0218301312500401
OAI identifier: oai:arXiv.org:1110.6377

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