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Neutron capture cross section of unstable 63Ni: implications for stellar nucleosynthesis

 

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Opened Access Neutron capture cross section of unstable 63Ni: implications for stellar nucleosynthesis
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Author: Quesada Molina, José Manuel
Lederer, C.
Massimi, C.
Altstadt, S.
Andrzejewski, J.
Audouin, L.
Barbagallo, M.
Bécares, V.
Department: Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Date: 2013-01-08
Published in: Physical Review Letters, 110 (2), 022501-1-022501-5.
Document type: Article
Abstract: The 63Ni(n,γ) cross section has been measured for the first time at the neutron time-of-flight facility n_TOF at CERN from thermal neutron energies up to 200 keV. In total, capture kernels of 12 (new) resonances were determined. Maxwellian averaged cross sections were calculated for thermal energies from   kT=5–100  keV with uncertainties around 20%. Stellar model calculations for a 25M⊙ star show that the new data have a significant effect on the s-process production of 63Cu, 64Ni, and 64Zn in massive stars, allowing stronger constraints on the Cu yields from explosive nucleosynthesis in the subsequent supernova.
Cite: Quesada Molina, J.M., Lederer, C., Massimi, C., Altstadt, S., Andrzejewski, J., Audouin, L.,...,Bécares, V. (2013). Neutron capture cross section of unstable 63Ni: implications for stellar nucleosynthesis. Physical Review Letters, 110 (2), 022501-1-022501-5.
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URI: http://hdl.handle.net/11441/62528

DOI: 10.1103/PhysRevLett.110.022501

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