| Title: | Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α,n) 25Mg |
Authors: | Massimi, C.
Altstadt, S.
Andrzejewski, J.
Audouin, L.
Barbagallo, M.
Bécares, V.
Bečvář, F.
Belloni, F.
Berthoumieux, E.
Billowes, J.
Bisterzo, S.
Bosnar, D.
Brugger, M.
Calviani, M.
Calviño, F.
Cano-Ott, D.
Carrapiço, C.
Castelluccio, D. M.
Cerutti, F.
Chiaveri, E.
Cosentino, L.
Chin, M.
Clai, G.
Colonna, N.
Cortés, G.
Cortés-Giraldo, M. A.
CRISTALLO, Sergio
Diakaki, M.
Domingo-Pardo, C.
Duran, I.
Dressler, R.
Eleftheriadis, C.
Ferrari, A.
Finocchiaro, P.
Fraval, K.
Ganesan, S.
García, A. R.
Giubrone, G.
Gonçalves, I. F.
González-Romero, E.
Griesmayer, E.
Guerrero, C.
Gunsing, F.
Hernández-Prieto, A.
Jenkins, D. G.
Jericha, E.
Kadi, Y.
Käppeler, F.
Karadimos, D.
Kivel, N.
Koehler, P.
Kokkoris, M.
Kopecky, S.
Krtička, M.
Kroll, J.
Lampoudis, C.
Langer, C.
Leal-Cidoncha, E.
Lederer, C.
Leeb, H.
Leong, L. S.
Lo Meo, S.
Losito, R.
Mallick, A.
Manousos, A.
Marganiec, J.
Martínez, T.
Mastinu, P. F.
Mastromarco, M.
Mendoza, E.
Mengoni, A.
Milazzo, P. M.
Mingrone, F.
Mirea, M.
Mondelaers, W.
Musumarra, A.
Paradela, C.
Pavlik, A.
Perkowski, J.
Pignatari, M.
PIERSANTI, Luciano
Plompen, A.
Praena, J.
Quesada, J. M.
Rauscher, T.
Reifarth, R.
Riego, A.
Robles, M. S.
Rubbia, C.
Sabaté-Gilarte, M.
Sarmento, R.
Saxena, A.
Schillebeeckx, P.
Schmidt, S.
Schumann, D.
Tagliente, G.
Tain, J. L.
Tarrío, D.
Tassan-Got, L.
Tsinganis, A.
Valenta, S.
Vannini, G.
Van Rijs, I.
Variale, V.
Vaz, P.
Ventura, A.
Vermeulen, M. J.
Vlachoudis, V.
Vlastou, R.
Wallner, A.
Ware, T.
Weigand, M.
Weiß, C.
Wynants, R.
Wright, T.
Žugec, P. |
Issue Date: | 2017 |
Journal: | PHYSICS LETTERS. SECTION B |
Number: | 768 |
First Page: | 1 |
Abstract: | This work reports on accurate, high-resolution measurements of the <SUP>25</SUP>Mg(n , γ)<SUP>26</SUP>Mg and <SUP>25</SUP>Mg(n , tot) cross sections in the neutron energy range from thermal to about 300 keV, leading to a significantly improved <SUP>25</SUP>Mg(n , γ)<SUP>26</SUP>Mg parametrization. The relevant resonances for n+<SUP>25</SUP>Mg 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 <SUP>26</SUP>Mg. With this information experimental upper limits of the reaction rates for <SUP>22</SUP>Ne(α , n)<SUP>25</SUP>Mg and <SUP>22</SUP>Ne(α , γ)<SUP>26</SUP>Mg were established, potentially leading to a significantly higher (α , n) / (α , γ) ratio than previously evaluated. The impact of these results has been studied for stellar models in the mass range 2 to 25 M<SUB>☉</SUB>. |
URI: | http://hdl.handle.net/20.500.12386/26872 |
URL: | https://www.sciencedirect.com/science/article/pii/S0370269317301260?via%3Dihub |
ISSN: | 0370-2693 |
DOI: | 10.1016/j.physletb.2017.02.025 |
Bibcode ADS: | 2017PhLB..768....1M |
Fulltext: | open |
| Appears in Collections: | 1.01 Articoli in rivista
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