English

A high-entropy wind r-process study based on nuclear-structure quantities from the new finite-range droplet model FRDM(2012)

Solar and Stellar Astrophysics 2015-06-19 v1 Nuclear Theory

Abstract

Theoretical studies of the nucleosynthesis origin of the heavy elements in our Solar System (S.S.) by the rapid neutron-capture process (r-process) still face the entwined uncertainties in the possible astrophysical scenarios and the nuclear-physics properties far from stability. In this paper we present results from the investigation of an r-process in the high-entropy wind (HEW) of core-collapse supernovae (here chosen as one of the possible scenarios for this nucleosynthesis process), using new nuclear-data input calculated in a consistent approach, for masses and β\beta-decay properties from the new finite-range droplet model FRDM(2012). The accuracy of the new mass model is 0.56 MeV with respect to {\sc AME2003}, to which it was adjusted. We compare the new HEW r-process abundance pattern to the latest S.S. r-process residuals and to our earlier calculations with the nuclear-structure quantities based on FRDM(1992). Substantial overall and specific local improvements in the calculated pattern of the r-process between A110A\simeq 110 and 209^{209}Bi, as well as remaining deficiencies are discussed in terms of the underlying spherical and deformed shell structure far from stability.

Keywords

Cite

@article{arxiv.1406.2529,
  title  = {A high-entropy wind r-process study based on nuclear-structure quantities from the new finite-range droplet model FRDM(2012)},
  author = {Karl-Ludwig Kratz and Khalil Farouqi and Peter Möller},
  journal= {arXiv preprint arXiv:1406.2529},
  year   = {2015}
}

Comments

8 pages, 4 figures

R2 v1 2026-06-22T04:34:59.293Z