Physics
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aps..aprh15006f&link_type=abstract
American Physical Society, 2008 APS April Meeting and HEDP/HEDLA Meeting, April 11-15, 2008, abstract #H15.006
Physics
Scientific paper
In our understanding of the origin of elemental abundances the means of producing the observed abundances of ^92Mo and ^94Mo have long been unknown. These ``light p'' nuclei cannot be adequately produced by the classic p-process alone. The νp-process however, which occurs due to the neutrino wind in core collapse supernovae explosions, involves both proton-capture and neutron-capture reactions and can produce ^92Mo and ^94Mo. The final abundances of these isotopes depend directly on the values of the proton separation energies, Sp, along the reaction path of this process. Recent mass measurements performed with the Canadian Penning Trap Mass Spectrometer have dramatically reduced the uncertainties of Sp values of proton-rich nuclei between Mo and Pd. These measurements and the resulting implications for both the νp-process path and the ^92Mo/^94Mo abundance ratio will be discussed. This work was supported by grants from NSERC, Canada and the U.S. DOE, Nucl. Phys. Div.,under Contract W-31-109-ENG-38
Buchinger F.
Caldwell S.
Clark Adam J.
Crawford Evan J.
Deibel Carsten
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