%0 Journal Article
%T Neutron spectroscopy of Mg-26 states: Constraining the stellar neutron source Ne-22(alpha, n)Mg-25
%A n_TOF Collaboration (Massimi, C. et al
%A Domingo-Pardo, C.
%A Giubrone, G.
%A Tain, J. L.
%J Physics Letters B
%D 2017
%V 768
%I Elsevier Science Bv
%@ 0370-2693
%G English
%F n_TOFCollaborationMassimi_etal2017
%O WOS:000400677700001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3112), last updated on Thu, 25 May 2017 15:46:51 +0000
%X This work reports on accurate, high-resolution measurements of the Mg-25(n, gamma)Mg-26 and Mg-25(n, tot) cross sections in the neutron energy range from thermal to about 300 keV, leading to a significantly improved Mg-25(n, gamma)Mg-26 parametrization. The relevant resonances for n+Mg-25 were characterized from a combined R-matrix analysis of the experimental data. This resulted in an unambiguous spin/parity assignment of the corresponding excited states in Mg-26. With this information experimental upper limits of the reaction rates for Ne-22(alpha, n)Mg-25 and Ne-22(alpha, gamma)Mg-26 were established, potentially leading to a significantly higher (alpha, n)/(alpha, gamma) ratio than previously evaluated. The impact of these results has been studied for stellar models in the mass range 2 to 25 M-circle dot. (C) 2017 The Author(s). Published by Elsevier B.V.
%K s Process
%K alpha+Ne-22
%K Neutron spectroscopy
%R 10.1016/j.physletb.2017.02.025
%U http://arxiv.org/abs/1702.04520
%U https://doi.org/10.1016/j.physletb.2017.02.025
%P 1-6