Wibowo, H. and Litvinova, E. (2024) Temperature evolution of the nucleon effective mass and symmetry energy coefficient in the 68−78Ni isotopic chain. Il nuovo cimento C, 47 (2). pp. 1-4. ISSN 1826-9885
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Abstract
The effective mass is an essential characteristic of nuclear matter and finite nuclei. The temperature evolution of the effective mass plays a signifi- cant role in understanding the temperature evolution of the symmetry coefficient of the nuclear equation of state. In the present contribution, the single-(quasi)particle spectra for 68–78Ni isotopes at zero and finite temperature are obtained by solv- ing the Dyson equation in the basis of Dirac spinors. While the static part of the self-energy of the Dyson equation has its origin from a self-consistent mean field gen- erated by the effective mesons, the dynamical part takes into account the coupling between (quasi)particles and phonons. In the leading approximation beyond the mean field, the (quasi)particle-vibration coupling (qPVC) mechanism is responsible for the fragmentation of single-(quasi)particle spectra. The calculated spectra of nickel isotopes yield the temperature-dependent effective mass for the 0 to 2 MeV temperature interval, which is relevant for astrophysical modeling, such as core- collapse supernova simulations. The impact of the temperature dependence of the effective mass on the symmetry coefficient in the nickel isotopic chain is discussed.
| Item Type: | Article |
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| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 20 May 2024 14:29 |
| Last Modified: | 20 May 2024 14:29 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/22923 |
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