A. Arcones, G. F. Bertsch
We show that long-range correlations for nuclear masses have a significant
effect on the synthesis of heavy elements by the r-process. As calculated by
Delaroche et al. [1], these correlations suppress magic number effects
associated with minor shells. This impacts the calculated abundances before the
third r-process peak (at mass number A~195), where the abundances are low and
form a trough. This trough and the position of the third abundance peak are
strongly affected by the masses of nuclei in the transition region between
deformed and spherical. Based on different astrophysical environments, our
results demonstrate that a microscopic theory of nuclear masses including
correlations naturally smoothens the separation energies, thus reducing the
trough and improving the agreement with observed solar system abundances.
View original:
http://arxiv.org/abs/1111.4923
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