Self-consistent mean-field models are able to reproduce well the overall properties of nuclei for a wide range of masses. Nevertheless, they are intrinsically unsuitable for the description of some important observables like the single-particle strength distribution or, in connection with collective states, their damping width and their gamma decay to the ground state or to low lying states. For this reason, a completely microscopic approach beyond mean- field has been implemented recently, based on the Skyrme functional. When beyond mean-field theories are handled, the mean-field-fitted effective interaction should be refitted at the desired level of approximation. If zero-range interactions are used, divergences arise. We present some steps towards the refitting of Skyrme interactions, for its application in finite nuclei.

A microscopic model beyond mean-field : from giant resonance properties to the fit of new effective interactions / M. Brenna, G. Colò, X. Roca-Maza, P.F. Bortignon, K. Moghrabi, M. Grasso. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - 533:1(2014), pp. 012027.1-012027.4. ((Intervento presentato al 20. convegno International School on Nuclear Physics, Neutron Physics and Applications tenutosi a Varna nel 2013 [10.1088/1742-6596/533/1/012027].

A microscopic model beyond mean-field : from giant resonance properties to the fit of new effective interactions

M. Brenna;G. Colò;X. Roca-Maza;P.F. Bortignon;
2014

Abstract

Self-consistent mean-field models are able to reproduce well the overall properties of nuclei for a wide range of masses. Nevertheless, they are intrinsically unsuitable for the description of some important observables like the single-particle strength distribution or, in connection with collective states, their damping width and their gamma decay to the ground state or to low lying states. For this reason, a completely microscopic approach beyond mean- field has been implemented recently, based on the Skyrme functional. When beyond mean-field theories are handled, the mean-field-fitted effective interaction should be refitted at the desired level of approximation. If zero-range interactions are used, divergences arise. We present some steps towards the refitting of Skyrme interactions, for its application in finite nuclei.
nuclei; PB-208; decay
Settore FIS/04 - Fisica Nucleare e Subnucleare
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/245010
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