Isospin symmetry breaking in the charge radius difference of mirror nuclei
Isospin symmetry breaking (ISB) effects in the charge radius difference Δ ch of mirror nuclei are studied using the test example of 48Ca and 48Ni . This choice allows for a transparent study of ISB contributions since pairing and deformation effects, commonly required for the study of mirror nuclei...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/215888 |
| Acceso en línea: | https://hdl.handle.net/2445/215888 |
| Access Level: | acceso abierto |
| Palabra clave: | Estructura nuclear Física nuclear Teoria del funcional de densitat Nuclear structure Nuclear physics Density functionals |
| Sumario: | Isospin symmetry breaking (ISB) effects in the charge radius difference Δ ch of mirror nuclei are studied using the test example of 48Ca and 48Ni . This choice allows for a transparent study of ISB contributions since pairing and deformation effects, commonly required for the study of mirror nuclei, can be neglected in this specific pair. The connection of Δ ch with the nuclear equation of state and the effect of ISB on such a relation are discussed according to an energy density functional approach. We find that nuclear ISB effects may shift the estimated value for the symmetry energy slope parameter by about 6 to 14 MeV while Coulomb corrections can be neglected. ISB effects on the ground-state energy and charge radii in mirror nuclei have been recently predicted by ab initio calculations to be relatively small, pointing to a negligible effect for the extraction of information on the nuclear EoS. These contrasting results call for a dedicated theoretical effort to solve this overarching problem that impacts not only the neutron-skin thickness or the difference in mass and charge radii of mirror nuclei but also other observables such as the isobaric analog state energy. |
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