Abstract
Mass excesses of short-lived nuclei , , , and have been directly measured to be , , , and , respectively. The deduced proton separation energy of for shows that this nucleus is only slightly proton unbound. X-ray burst model calculations with the new mass excess of suggest that the majority of the reaction flow passes through via proton capture, indicating that is not a significant -process waiting point.
- Received 8 January 2011
DOI:https://doi.org/10.1103/PhysRevLett.106.112501
© 2011 American Physical Society