Artículo
Resonance neutron-capture cross sections of stable magnesium isotopes and their astrophysical implications
Autor/es | Massimi, C.
Koehler, P. Bisterzo, S. Colonna, Nicola Gallino, R. Gunsing, F. Quesada Molina, José Manuel Lozano Leyva, Manuel Luis Praena Rodríguez, Javier Wisshak, K. |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2012 |
Fecha de depósito | 2017-04-05 |
Publicado en |
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Resumen | We have measured the neutron capture cross sections of the stable magnesium isotopes 24 ,25 ,26Mg in the energy range of interest to the s process using the neutron time-of-flight facility n-TOF at CERN. Capture events ... We have measured the neutron capture cross sections of the stable magnesium isotopes 24 ,25 ,26Mg in the energy range of interest to the s process using the neutron time-of-flight facility n-TOF at CERN. Capture events from a natural metal sample and from samples enriched in 25Mg and 26Mg were recorded using the total energy method based on C 62H 6 detectors. Neutron resonance parameters were extracted by a simultaneous resonance shape analysis of the present capture data and existing transmission data on a natural isotopic sample. Maxwellian-averaged capture cross sections for the three isotopes were calculated up to thermal energies of 100 keV and their impact on s-process analyses was investigated. At 30 keV the new values of the stellar cross section for 24Mg, 25Mg, and 26Mg are 3.8±0.2 mb, 4.1±0.6 mb, and 0.14±0.01 mb, respectively. |
Cita | Massimi, C., Koehler, P., Bisterzo, S., Colonna, N., Gallino, R., Gunsing, F.,...,Wisshak, K. (2012). Resonance neutron-capture cross sections of stable magnesium isotopes and their astrophysical implications. Physical Review C - Nuclear Physics, 85 (4), 044615-1-044615-15. |
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Resonance neutron-capture cross.pdf | 2.116Mb | [PDF] | Ver/ | |