Resonance neutron-capture cross sections of stable magnesium isotopes and their astrophysical implications

C. Massimi P. Koehler S. Bisterzo N. Colonna R. Gallino F. Gunsing 1 F. K¨appeler G. Lorusso A. Mengoni M. Pignatari G. Vannini U. Abbondanno G. Aerts 1 H. A' Lvarez F. A' Lvarez-Velarde S. Andriamonje 1 J. Andrzejewski P. Assimakopoulos L. Audouin 2 G. Badurek M. Barbagallo P. Baumann 3 F. Beˇcv'Aˇr F. Belloni M. Bennett E. Berthoumieux 1 M. Calviani F. Calvi˜no D. Cano-Ott R. Capote C. Carrapic¸o A. Carrillo de Albornoz P. Cennini V. Chepel E. Chiaveri G. Cortes A. Couture J. Cox M. Dahlfors S. David 2 I. Dillmann R. Dolfini C. Domingo-Pardo W. Dridi 1 I. Duran C. Eleftheriadis M. Embid-Segura L. Ferrant 2 A. Ferrari R. Ferreira-Marques L. Fitzpatrick H. Frais-Koelbl K. Fujii W. Furman I. Goncalves E. Gonz'Alez-Romero A. Goverdovski F. Gramegna E. Griesmayer C. Guerrero B. Haas 4 R. Haight M. Heil A. Herrera-Martinez F. Herwig 5 R. Hirschi M. Igashira S. Isaev 1 E. Jericha Y. Kadi D. Karadimos D. Karamanis 4 M. Kerveno 3 V. Ketlerov V. Konovalov S. Kopecky E. Kossionides M. Krtiˇcka C. Lampoudis 1 H. Leeb C. Lederer A. Lindote I. Lopes R. Losito M. Lozano S. Lukic J. Marganiec L. Marques S. Marrone T. Mart'Inez P. Mastinu E. Mendoza P. M. Milazzo C. Moreau M. Mosconi F. Neves H. Oberhummer S. O'Brien M. Oshima J. Pancin 1 C. Papachristodoulou C. Papadopoulos C. Paradela N. Patronis A. Pavlik P. Pavlopoulos 6 L. Perrot 1 M. T. Pigni R. Plag A. Plompen A. Plukis 1 A. Poch J. Praena C. Pretel J. Quesada T. Rauscher G. Rockefeller M. Rosetti C. Rubbia G. Rudolf J. Salgado C. Santos L. Sarchiapone I. Savvidis G. Tagliente J. L. Tain D. Tarr'Io L. Tavora R. Terlizzi P. Vaz A. Ventura D. Villamarin V. Vlachoudis R. Vlastou F. Voss S. Walter H. Wendler M. Wiescher K. Wisshak
Abstract : 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 C6 2H6 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.
Type de document :
Article dans une revue
Physical Review C, American Physical Society, 2012, 85, pp.044615. <10.1103/PhysRevC.85.044615>


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Soumis le : mercredi 23 mai 2012 - 14:29:43
Dernière modification le : vendredi 11 septembre 2015 - 09:58:19

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C. Massimi, P. Koehler, S. Bisterzo, N. Colonna, R. Gallino, et al.. Resonance neutron-capture cross sections of stable magnesium isotopes and their astrophysical implications. Physical Review C, American Physical Society, 2012, 85, pp.044615. <10.1103/PhysRevC.85.044615>. <in2p3-00700563>

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