1 research outputs found
Short-lived p-nuclides in the early solar system and implications on the nucleosynthetic role of X-ray binaries
The data available for short-lived -nuclides are used in an open nonlinear
model of the chemical evolution of the Galaxy in order to discuss the origin of
extinct radionuclides, the stellar sources of -nuclides, and the chronology
of solar system formation. It is concluded that the observed abundances of
Tc, Tc, Nb, and Sm in the early solar system are
consistent with nucleosynthesis in type II supernovae during continuous
chemical evolution of the Galaxy and a subsequent short isolation of the
presolar molecular cloud from fresh nucleosynthetic inputs. However, further
work on supernova models is needed before -radionuclides will comprise
reliable cosmochronometers. Despite these limitations, we argue that niobium-92
can be used to test whether the {\it rp}-process contributed to the synthesis
of light {\it p}-nuclides in the Mo-Ru region.Comment: 8 pages, 2 figures. Proceedings of the Nuclear Physics in
Astrophysics Conference, Debrecen, Hungary, 2002, to appear in Nucl. Phys.