Search results for "Neutron density"
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Nuclear Physics Constraints to Bring the Astrophysical R-Process to the “Waiting Point”
1988
Rapid neutron-capture (r-process) nucleosynthesis of heavy elements generally involves the participation of large numbers of stable to highly unstable nuclear species. Most of these properties are experimentally unknown and have to be predicted from nuclear models. So far, the uncertainties of such predictions have not allowed putting substantial constraints on astrophysical scenarios. For the classical r-process it is shown that the s-decay properties of only a few key-nuclei, i.e. the recently measured “waiting-point” nuclei 130Cd82 and 80Zn50 together with new shell-model predictions for their N ≈ 82 and 50 neighbours, may be sufficient to explain the observed r-abundances in the A ≈ 130…
Nuclei Far from Stability and the R-Process Waiting-Point Concept
1992
The nucleosynthesis process by rapid neutron captures (the r-process) is responsible for the formation of about half of the nuclear species in nature beyond Fe. While the astrophysical site for the r-process is not yet unambiguously identified, its association with the cores of low-mass stars undergoing type II supernova (SN) events is strongly suggested (see, e.g., Refs.1,2).