Mass measurements towards doubly magic Ni-78 : Hydrodynamics versus nuclear mass contribution in core-collapse supernovae
| Autor: | S. Giraud, L. Canete, B. Bastin, A. Kankainen, A.F. Fantina, F. Gulminelli, P. Ascher, T. Eronen, V. Girard-Alcindor, A. Jokinen, A. Khanam, I.D. Moore, D.A. Nesterenko, F. de Oliveira Santos, H. Penttilä, C. Petrone, I. Pohjalainen, A. De Roubin, V.A. Rubchenya, M. Vilen, J. Äystö |
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| Přispěvatelé: | Department of Physics, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), GANIL, University of Jyväskylä, CNRS, University of Bordeaux, Antimatter and Nuclear Engineering, University of Jyvaskyla, CERN, Department of Applied Physics, Aalto-yliopisto, Aalto University |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
NUCLEOSYNTHESIS
IONS Core-collapse supernova Nuclear and High Energy Physics Science & Technology IMPACT Physics Penning trap R-PROCESS neutronit Astronomy & Astrophysics [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] 114 Physical sciences STATE Physics Particles & Fields Physics Nuclear SPECTROMETRY Physical Sciences ISOTOPES Nuclear mass Nuclear Physics - Experiment ydinfysiikka Shell gap |
| Zdroj: | Phys.Lett.B Phys.Lett.B, 2022, 833, pp.137309. ⟨10.1016/j.physletb.2022.137309⟩ |
| DOI: | 10.1016/j.physletb.2022.137309⟩ |
| Popis: | International audience; We report the first high-precision mass measurements of the neutron-rich nuclei 74,75Ni and the clearly identified ground state of 76Cu, along with a more precise mass-excess value of 78Cu, performed with the double Penning trap JYFLTRAP at the Ion Guide Isotope Separator On-Line (IGISOL) facility. These new results lead to a quantitative estimation of the quenching for the N=50 neutron shell gap. The impact of this shell quenching on core-collapse supernova dynamics is specifically tested using a dedicated statistical equilibrium approach that allows a variation of the mass model independent of the other microphysical inputs. We conclude that the impact of nuclear masses is strong when implemented using a fixed trajectory as in the previous studies, but the effect is substantially reduced when implemented self-consistently in the simulation. |
| Databáze: | OpenAIRE |
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