A microscopic model aimed to the description of charge-exchange nuclear excitations along isotopic chains which include open-shell systems, is developed. It consists of QRPA made on top of 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 the 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 CSB-CIB forces and the electromagnetic spin-orbit, are elucidated by means of numerical calculations of the Isobaric Analog Resonances. 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.
|Titolo:||The fully self-consistent charge-exchange QRPA and its application to the Isobaric Analog Resonances|
|Parole Chiave:||HF calculations; isobaric analogue resonances; nuclear forces; nuclei with mass number 90 to 149; RPA calculations|
|Settore Scientifico Disciplinare:||Settore FIS/01 - Fisica Sperimentale|
|Data di pubblicazione:||2005|
|Digital Object Identifier (DOI):||10.1103/PhysRevC.72.064310|
|Appare nelle tipologie:||01 - Articolo su periodico|