Mass measurements towards doubly magic 78Ni : Hydrodynamics versus nuclear mass contribution in core-collapse supernovae
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
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Physics Letters BDate
2022Discipline
KiihdytinlaboratorioResurssiviisausyhteisöAccelerator LaboratorySchool of Resource WisdomCopyright
© 2022 The Authors. Published by Elsevier B.V. Funded by SCOAP3.
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.
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https://converis.jyu.fi/converis/portal/detail/Publication/150910892
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Research Council of Finland; European CommissionFunding program(s)
Academy Research Fellow, AoF; Research costs of Academy Research Fellow, AoF; ERC Consolidator Grant; Research infrastructures, H2020; Centre of Excellence, AoF
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about funding
This work has been supported by the Academy of Finland Grant No. 284612 (the Finnish Centre of Excellence Program in Nuclear and Accelerator Based Physics Research at JYFL 2012-2017) and by the European Union's Horizon 2020 Research and Innovation Programme Grant Agreement No. 654002 (ENSAR2). A.K. acknowledges support from the Academy of Finland under Grant No. 275389, and D.A.N. and L.C. acknow ...
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