Neutron capture nucleosynthesis and the evolution of 15 and 30 solar-mass stars. I - The core helium burning phase

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Neutrons, Nuclear Capture, Nuclear Fusion, Stellar Evolution, Stellar Mass, Supergiant Stars, Carbon Monoxide, Helium, Stellar Cores, Stellar Models, Temperature Dependence

Scientific paper

Neutron capture nucleosynthesis during central He-burning in massive (M/ZAMS/ = 15 and 30 solar-mass stars) mass-losing population I stars with and without convective overshooting, is studied by coupling a stellar evolution code to a detailed nucleosynthesis network. The nucleosynthesis is followed with the aid of a full reaction network incorporating up-to-date Maxwellian averaged neutron capture cross-sections, and new density- and temperature-dependent beta-decay and electron capture rates.

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