Physics Letters B (Oct 2022)
Mass measurements towards doubly magic 78Ni: Hydrodynamics versus nuclear mass contribution in core-collapse supernovae
- 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
Affiliations
- S. Giraud
- GANIL, Bd Henri Becquerel, BP 55027, F-14076 Caen Cedex 5, France; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Corresponding author at: National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA.
- L. Canete
- University of Jyvaskyla, P.O. Box 35, FI-40014 University of Jyvaskyla, Finland; University of Surrey, Guildford, GU2 7XH, United Kingdom
- B. Bastin
- GANIL, Bd Henri Becquerel, BP 55027, F-14076 Caen Cedex 5, France
- A. Kankainen
- University of Jyvaskyla, P.O. Box 35, FI-40014 University of Jyvaskyla, Finland
- A.F. Fantina
- GANIL, Bd Henri Becquerel, BP 55027, F-14076 Caen Cedex 5, France
- F. Gulminelli
- LPC (CNRS/ENSICAEN/Université de Caen Normandie), UMR6534, 14050 Caen Cedex, France
- P. Ascher
- CENBG, CNRS/IN2P3—Université Bordeaux 1, 33175 Gradignan Cedex, France
- T. Eronen
- University of Jyvaskyla, P.O. Box 35, FI-40014 University of Jyvaskyla, Finland
- V. Girard-Alcindor
- GANIL, Bd Henri Becquerel, BP 55027, F-14076 Caen Cedex 5, France; Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France; TU Darmstadt, Schlossgartenstraße 9, D-64289 Darmstadt, Germany
- A. Jokinen
- University of Jyvaskyla, P.O. Box 35, FI-40014 University of Jyvaskyla, Finland
- A. Khanam
- Department of Applied Physics, Aalto University, P.O. Box 15100, FI-00076 Aalto, Finland; Department of Physics, University of Helsinki, P.O. Box 43, FI-00014 Helsinki, Finland; University of Jyvaskyla, P.O. Box 35, FI-40014 University of Jyvaskyla, Finland
- I.D. Moore
- University of Jyvaskyla, P.O. Box 35, FI-40014 University of Jyvaskyla, Finland
- D.A. Nesterenko
- University of Jyvaskyla, P.O. Box 35, FI-40014 University of Jyvaskyla, Finland
- F. de Oliveira Santos
- GANIL, Bd Henri Becquerel, BP 55027, F-14076 Caen Cedex 5, France
- H. Penttilä
- University of Jyvaskyla, P.O. Box 35, FI-40014 University of Jyvaskyla, Finland
- C. Petrone
- IFIN-HH, P.O. Box MG-6, 077125 Bucharest-Magurele, Romania
- I. Pohjalainen
- University of Jyvaskyla, P.O. Box 35, FI-40014 University of Jyvaskyla, Finland
- A. De Roubin
- University of Jyvaskyla, P.O. Box 35, FI-40014 University of Jyvaskyla, Finland
- V.A. Rubchenya
- University of Jyvaskyla, P.O. Box 35, FI-40014 University of Jyvaskyla, Finland
- M. Vilen
- University of Jyvaskyla, P.O. Box 35, FI-40014 University of Jyvaskyla, Finland; Experimental Physics Department, CERN, CH-1211 Geneva 23, Switzerland
- J. Äystö
- University of Jyvaskyla, P.O. Box 35, FI-40014 University of Jyvaskyla, Finland
- Journal volume & issue
-
Vol. 833
p. 137309
Abstract
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.
