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Título

Neutron Capture Cross Section of Unstable Ni-63: Implications for Stellar Nucleosynthesis

Autorn_TOF Collaboration; Lederer, Claudia; Domingo Pardo, César ; Giubrone, Giuseppe ; Taín, José Luis
Palabras claveS-process nucleosynthesis
Massive stars
Fecha de publicación8-jun-2013
EditorAmerican Physical Society
CitaciónPhysical Review - Section D - Particles and Fields 110 (2): 022501 - 5 (2013)
ResumenThe Ni-63(n, gamma) 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(circle dot) star show that the new data have a significant effect on the s-process production of Cu-63, Ni-64, and Zn-64 in massive stars, allowing stronger constraints on the Cu yields from explosive nucleosynthesis in the subsequent supernova. DOI: 10.1103/PhysRevLett.110.022501
Versión del editorhttp://dx.doi.org/10.1103/PhysRevLett.110.022501
URIhttp://hdl.handle.net/10261/126474
DOI10.1103/PhysRevLett.110.022501
ISSN1550-7998
E-ISSN1550-2368
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