Abstract
The data available for short-lived p-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 p-nuclides, and the chronology of solar system formation. It is concluded that the observed abundances of Tc-97, Te-98, Nb-92, and Sm-146 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 p-radionuclides will comprise reliable cosmochronometers. Despite these limitations, we argue that niobium-92 can be used to test whether the rp-process contributed to the synthesis of light p-nuclides in the Mo-Ru region.
| Original language | English |
|---|---|
| Pages (from-to) | 287C-295C |
| Number of pages | 9 |
| Journal | Nuclear Physics A |
| Volume | 719 |
| DOIs | |
| Publication status | Published - 19 May 2003 |
| Event | 17th International Nuclear Physics Divisional Conference of the European-Physical-Society - DEBRECEN, Hungary Duration: 30 Sept 2002 → 4 Oct 2002 |
Keywords
- STATISTICAL-MODEL CALCULATIONS
- CHEMICAL EVOLUTION
- COSMIC-RAYS
- METEORITES
- CROSS-SECTIONS
- EXTINCT RADIOACTIVITIES
- ANGRA-DOS-REIS
- ELEMENTS
- ASTROPHYSICAL REACTION-RATES
- ACCRETING NEUTRON-STARS