dorsal/arxiv
View SchemaIsoscalar Giant Dipole Resonances in Spherical Nuclei - Macroscopic Description
| Authors | Serban Misicu |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0603022 |
| URL | https://arxiv.org/abs/nucl-th/0603022 |
Abstract
The properties of the Isoscalar Giant Dipole Resonance (ISGDR) and its electromagnetic structure are investigated within a semiclassical nuclear Fermi-Fluid dynamical approach. Microscopical calculations pointing to a ISGDR distribution splitted into two main broad structures is confirmed within the presented macroscopic approach by the occurence of a ''low-lying'' and a ''high-lying'' state, that are nothing else than the first two overtones of the same resonance. Macroscopically they are pictured as a combination of compressional and vortical nuclear flows. In the second part of the paper the electromagnetic structure of the ISGDR, relevant for reactions with inelastically scattered electrons, and the relation between the vorticity and the toroidal dipole moment is analyzed. The relative strengths of the compresional and vortical collective currents is evaluated by means of electron-scattering sum-rules.
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"abstract": "The properties of the Isoscalar Giant Dipole Resonance (ISGDR) and its\nelectromagnetic structure are investigated within a semiclassical nuclear\nFermi-Fluid dynamical approach. Microscopical calculations pointing to a ISGDR\ndistribution splitted into two main broad structures is confirmed within the\npresented macroscopic approach by the occurence of a \u0027\u0027low-lying\u0027\u0027 and a\n\u0027\u0027high-lying\u0027\u0027 state, that are nothing else than the first two overtones of the\nsame resonance. Macroscopically they are pictured as a combination of\ncompressional and vortical nuclear flows. In the second part of the paper the\nelectromagnetic structure of the ISGDR, relevant for reactions with\ninelastically scattered electrons, and the relation between the vorticity and\nthe toroidal dipole moment is analyzed. The relative strengths of the\ncompresional and vortical collective currents is evaluated by means of\nelectron-scattering sum-rules.",
"arxiv_id": "nucl-th/0603022",
"authors": [
"Serban Misicu"
],
"categories": [
"nucl-th"
],
"title": "Isoscalar Giant Dipole Resonances in Spherical Nuclei - Macroscopic Description",
"url": "https://arxiv.org/abs/nucl-th/0603022"
},
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