| Thème(s) : |
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Physique/Physique Nucléaire Expérimentale
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| Titre : |
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Resonance neutron-capture cross sections of stable magnesium isotopes and their astrophysical implications |
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| Auteur : |
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G. Aerts1, S. Andriamonje1, L. Audouin2, P. Baumann3, E. Berthoumieux1, C. Carrapiço1, S. David2, W. Dridi1, L. Ferrant2, F. Gunsing1, B. Haas4, S. Isaev1, D. Karamanis4, M. Kerveno3, C. Lampoudis1, J. Pancin1, P. Pavlopoulos5, L. Perrot1, A. Plukis1, C. Stephan2, L. Tassan-Got2, C. Massini |
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| Laboratoire : |
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| équipe(s) de recherche : |
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ACEN |
| Résumé : |
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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 C62H6 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. |
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| Collaboration/Projet : |
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TOF |
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| Type de publication : |
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Articles dans des revues avec comité de lecture |
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Date de publication
ou d'écriture : |
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2012 |
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| Nom du périodique : |
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| Physical Review C (Phys. Rev. C) |
| Publisher |
American Physical Society |
| ISSN |
0556-2813 (eISSN : 1089-490X) |
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| Volume : |
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85 |
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| Page/Article : |
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044615 |
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