dorsal/arxiv
View SchemaThe fully self-consistent quasiparticle random phase approximation and its application to the isobaric analog resonances
| Authors | S. Fracasso, G. Colo` |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0510053 |
| URL | https://arxiv.org/abs/nucl-th/0510053 |
| DOI | 10.1103/PhysRevC.72.064310 |
| Journal | Phys.Rev.C72:064310,2005 |
Abstract
A microscopic model aimed at the description of charge-exchange nuclear excitations along isotopic chains which include open-shell systems, is developed. It consists of quasiparticle random phase approximation (QRPA) made on top of Hartree-Fock-Bardeen-Cooper-Schrieffer (HF-BCS). The calculations are performed by using the Skyrme interaction in the particle-hole channel and a zero-range, density-dependent pairing force in the particle-particle channel. At variance with the (many) versions of QRPA which are available in literature, in our work special emphasis is put on the full self-consistency. Its importance, as well as the role played by the charge-breaking terms of the nuclear Hamiltonian, like the Coulomb interaction, the charge symmetry and charge independence breaking (CSB-CIB) forces and the electromagnetic spin-orbit, are elucidated by means of numerical calculations of the isobaric analog resonances (IAR). The theoretical energies of these states along the chain of the Sn isotopes agree well with the experimental data in the stable isotopes. Predictions for unstable systems are presented.
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"abstract": "A microscopic model aimed at the description of charge-exchange nuclear\nexcitations along isotopic chains which include open-shell systems, is\ndeveloped. It consists of quasiparticle random phase approximation (QRPA) made\non top of Hartree-Fock-Bardeen-Cooper-Schrieffer (HF-BCS). The calculations are\nperformed by using the Skyrme interaction in the particle-hole channel and a\nzero-range, density-dependent pairing force in the particle-particle channel.\nAt variance with the (many) versions of QRPA which are available in literature,\nin our work special emphasis is put on the full self-consistency. Its\nimportance, as well as the role played by the charge-breaking terms of the\nnuclear Hamiltonian, like the Coulomb interaction, the charge symmetry and\ncharge independence breaking (CSB-CIB) forces and the electromagnetic\nspin-orbit, are elucidated by means of numerical calculations of the isobaric\nanalog resonances (IAR). The theoretical energies of these states along the\nchain of the Sn isotopes agree well with the experimental data in the stable\nisotopes. Predictions for unstable systems are presented.",
"arxiv_id": "nucl-th/0510053",
"authors": [
"S. Fracasso",
"G. Colo`"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.72.064310",
"journal_ref": "Phys.Rev.C72:064310,2005",
"title": "The fully self-consistent quasiparticle random phase approximation and its application to the isobaric analog resonances",
"url": "https://arxiv.org/abs/nucl-th/0510053"
},
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