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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:42 |
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Conference: Bucharest University Faculty of Physics 2013 Meeting
Section: Theoretical Physics and Applied Mathematics
Title:
Pygmy Dipole Resonance in a schematic model
Authors:
Andreea Croitoru (1), V. Baran (2), Maria Colonna (3), M. Di Toro (3), D. Dumitru (4), Roxana Zus (2)
Affiliation:
1. Research Center "Theoretical Physics", Faculty of Physics, University of Bucharest
2. Faculty of Physics, University of Bucharest
3. Laboratori Nazionali del Sud, INFN, Catania, Italy
4. Doctoral School, Faculty of Physics, University of Bucharest
E-mail
c.m.andreea@gmail.com
Keywords:
Pygmy Dipole Resonance, Energy Weighted Sum Rule, shell model
Abstract:
We develop a schematic model based on the Harmonic Oscillator
Shell Model which includes a dipolar residual interaction.
The model predicts the existence of two dipolar collective
modes, clearly separated in energy. Higher energy centroid
describes quite well the properties of Giant Dipole Resonance
while the lower peak, close to the harmonic oscillator energy,
corresponds to Pygmy Dipole Resonance. We estimate the
Energy Weighted Sum Rule exhausted by each collective state and discuss the dependence of their properties on coupling parameters.
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