In:
Journal of Physics: Conference Series, IOP Publishing, Vol. 2586, No. 1 ( 2023-09-01), p. 012105-
Abstract:
The lighter heavy elements of the first r-process peak, between strontium and silver, can be synthesized in the moderately neutron-rich neutrino–driven ejecta of either core–collapse supernovae or neutron star mergers via the weak r–process. This nucleosynthesis scenario exhibits uncertainties from the absence of experimental data from ( α, xn ) reactions on neutron–rich nuclei, which are currently based on statistical model estimates. We have performed a new impact study to identify the most important ( α, xn ) reactions that can affect the production of the lighter heavy elements under different astrophysical conditions and using new, constrained ( α, xn ) reaction rates based on the Atomki-V2 α OMP. We have identified a list of relevant reactions that affect elemental abundance ratios that can be compared to abundances from metal-poor stars. Our results show how when reducing the nuclear physics uncertainties, we can use abundance ratios to constrain the astrophysical conditions/environment. This will be possible with the planned experiments to measure key ( α, xn ) reaction rates using the SECAR recoil separator at FRIB that will also be briefly discussed.
Type of Medium:
Online Resource
ISSN:
1742-6588
,
1742-6596
DOI:
10.1088/1742-6596/2586/1/012105
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2023
detail.hit.zdb_id:
2166409-2
Bookmarklink