Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-11-05
Astronomy and Astrophysics
Astrophysics
accepted for Physical Review C; table and figures added, discussion expanded
Scientific paper
10.1103/PhysRevC.79.045802
Nucleosynthesis in Type I X-ray bursts may involve up to several thousand nuclear processes. The majority of these processes have only been determined theoretically due to the lack of sufficient experimental information. Accurate reaction Q-values are essential for reliable theoretical estimates of reaction-rates. Those reactions with small Q-values (< 1 MeV) are of particular interest in these environments as they may represent waiting points for a continuous abundance flow towards heavier-mass nuclei. To explore the nature of these waiting points, we have performed a comprehensive series of post-processing calculations which examine the sensitivity of nucleosynthesis in Type I X-ray bursts to uncertainties in reaction Q-values. We discuss and list the relatively few critical masses for which measurements could better constrain the results of our studies. In particular, we stress the importance of measuring the mass of 65As to obtain an experimental Q-value for the 64Ge(p,gamma)65As reaction.
Iliadis Ch.
Jose Jubin
Moreno Fermin
Parikh Anuj
Rauscher Thomas
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