Direct Mass Measurements of Short-Lived A=2Z-1 Nuclides Ge63, As65, Se67, and Kr71 and Their Impact on Nucleosynthesis in the rp Process

Details Direct Mass Measurements of Short-Lived A=2Z-1 Nuclides Ge63, As65, Se67, and Kr71 and Their Impact on Nucleosynthesis in the rp Process Direct Mass Measurements of Short-Lived A=2Z-1 Nuclides Ge63, As65, Se67, and Kr71 and Their Impact on Nucleosynthesis in the rp Process

Mar 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011phrvl.106k2501t&link_type=abstract

Physical Review Letters, vol. 106, Issue 11, id. 112501

Physics

11

Binding Energies And Masses, Explosive Burning In Accreting Binary Systems, Storage Rings And Colliders

Scientific paper

Mass excesses of short-lived A=2Z-1 nuclei Ge63, As65, Se67, and Kr71 have been directly measured to be -46921(37), -46937(85), -46580(67), and -46320(141)keV, respectively. The deduced proton separation energy of -90(85)keV for As65 shows that this nucleus is only slightly proton unbound. X-ray burst model calculations with the new mass excess of As65 suggest that the majority of the reaction flow passes through Ge64 via proton capture, indicating that Ge64 is not a significant rp-process waiting point.

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