GIRAUD, S.; CANETE, L.; BASTIN, B.; KANKAINEN, A.; FANTINA, A.F.; GULMINELLI, F.; ASCHER, P.; ERONEN, T.; GIRARD-ALCINDOR, V.; JOKINEN, A.; KHANAM, A.; MOORE, I.D.; NESTERENKO, D.A.; DE OLIVEIRA SANTOS, F.; PENTTILÄ, H.; PETRONE, C.; POHJALAINEN, I.; DE ROUBIN, A.; RUBCHENYA, V.A.; VILEN, M.; ÄYSTÖ, J.

doi:10.1016/j.physletb.2022.137309

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GIRAUD, S.
Grand Accélérateur National d'Ions Lourds [GANIL]

CANETE, L.

BASTIN, B.
Grand Accélérateur National d'Ions Lourds [GANIL]

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Phys.Lett.B. 2022, vol. 833, p. 137309

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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 <math altimg="si1.svg"><mi>N</mi><mo linebreak="goodbreak" linebreakstyle="after">=</mo><mn>50</mn></math> 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.< Leer menos

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Nuclear mass

Penning trap

Shell gap

Core-collapse supernova

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Mass measurements towards doubly magic $^{78}$Ni: Hydrodynamics versus nuclear mass contribution in core-collapse supernovae

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