Bochum 2009 – scientific programme
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HK: Fachverband Hadronen und Kerne
HK 38: Nuclear Astrophysics
HK 38.3: Talk
Tuesday, March 17, 2009, 17:30–17:45, H-ZO 60
Constraining Nucleosynthesis in Type I X-Ray Bursts through Mass Measurements — •Anuj Parikh1,2, Jordi José2,3, Christian Iliadis4,5, Fermin Moreno2, and Thomas Rauscher6 — 1Physik Department E12, Technische Universität München, D-85748 Garching, Germany — 2Departament de Física i Enginyeria Nuclear, EUETIB, Universitat Politècnica de Catalunya, E-08036 Barcelona, Spain — 3Institut d’Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, Spain — 4Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599-3255, USA — 5Triangle Universities Nuclear Laboratory, Durham, NC 27708-0308, USA — 6Department of Physics, University of Basel, CH-4056 Basel, Switzerland
Type I X-ray bursts are explosive stellar events resulting from thermonuclear ignition in the H/He-rich envelopes of accreting neutron stars. Nucleosynthesis in these phenomena may involve up to several thousand nuclear processes. Those reactions with small Q-values (less than 1 MeV) are of particular interest in these environments as they may represent waiting points for a continuous abundance flow towards heavier-mass nuclei. 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 both reaction rates and reaction Q-values. We discuss 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 masses of 65As and 66Se.