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

Loading...
Thumbnail Image
Access rights
openAccess
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2022-07-16
Major/Subject
Mcode
Degree programme
Language
en
Pages
6
1-6
Series
Physics Letters B, Volume 833
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.
Description
| openaire: EC/H2020/654002/EU//ENSAR2 | openaire: EC/H2020/771036/EU//MAIDEN
Keywords
Other note
Citation
Giraud, S, Canete, L, Bastin, B, Kankainen, A, Fantina, A F, Gulminelli, F, Ascher, P, Eronen, T, Alcindor, V G, Jokinen, A, Khanam, A, Moore, I D, Nesterenko, D A, Santos, F D O, Penttilä, H, Petrone, C, Pohjalainen, I, de Roubin, A, Rubchenya, V A, Vilen, M & Äystö, J 2022, ' Mass measurements towards doubly magic 78Ni: Hydrodynamics versus nuclear mass contribution in core-collapse supernovae ', Physics Letters B, vol. 833, 137309, pp. 1-6 . https://doi.org/10.1016/j.physletb.2022.137309