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

20th International School on Nuclear Physics, Neutron Physics and Applications

Brenna, M.^1 ; Colò, G.^1 ; Roca-Maza, X.^1 ; Bortignon, P.F.^1 ; Moghrabi, K.^2 ; Grasso, M.^2

Dipartimento di Fisica, Università Degli Studi di Milano, Sezione di Milano, Via Celoria 16, Milan

I-20133, Italy^1

Institut de Physique Nucléaire, Université Paris-Sud, IN2P3-CNRS, Orsay Cedex

F-91406, France^2

关键词: Effective interactions;    Giant resonances;    ITS applications;    Microscopic modeling;    Overall properties;    Self-consistent mean field;    Skyrme interaction;    Zero range interaction;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/533/1/012027/pdf
DOI  :  10.1088/1742-6596/533/1/012027

来源: IOP

【 摘 要 】

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.