A1 Journal article (refereed)
Mass measurements towards doubly magic 78Ni : Hydrodynamics versus nuclear mass contribution in core-collapse supernovae (2022)

Giraud, S., Canete, L., Bastin, B., Kankainen, A., Fantina, A.F., Gulminelli, F., Ascher, P., Eronen, T., Girard, A. V., Jokinen, A., Khanam, A., Moore, I.D., Nesterenko, D.A., de Oliveira, S. F., Penttilä, H., Petrone, C., Pohjalainen, I., De Roubin, A., Rubchenya, V., . . . Äystö, J. (2022). Mass measurements towards doubly magic 78Ni : Hydrodynamics versus nuclear mass contribution in core-collapse supernovae. Physics Letters B, 833, Article 137309. https://doi.org/10.1016/j.physletb.2022.137309

JYU authors or editors

Publication details

All authors or editors: Giraud, S.; Canete, L.; Bastin, B.; Kankainen, A.; Fantina, A.F.; Gulminelli, F.; Ascher, P.; Eronen, T.; Girard, Alcindor V.; Jokinen, A.; et al.

Journal or series: Physics Letters B

ISSN: 0370-2693

eISSN: 1873-2445

Publication year: 2022

Volume: 833

Article number: 137309

Publisher: Elsevier BV

Publication country: Netherlands

Publication language: English

DOI: https://doi.org/10.1016/j.physletb.2022.137309

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/82593

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 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.

Keywords: nuclear physics; neutrons

Free keywords: nuclear mass; penning trap; shell gap; core-collapse supernova

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Ministry reporting: Yes

Reporting Year: 2022

Preliminary JUFO rating: 2