Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α,n)25Mg
This work reports on accurate, high-resolution measurements of the 25Mg(n,γ)26Mg and 25Mg(n,tot) cross sections in the neutron
energy range from thermal to about 300 keV, leading to a significantly improved 25Mg(n,α)26Mg parametrization. The relevant
resonances for n+25Mg 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 26Mg. With this information experimental upper limits of the reaction rates for 22Ne(α,n)25Mg and 22Ne(α,γ)26Mg were established, potentially leading to a significantly higher (α,n)/(α,γ) ratio than previously evaluated. The impact of these results have been studied for stellar models in the mass range 2 to 25 M⊙.
MASSIMI C.;
ALTSTADT S.;
ANDRZEJEWSKI J.;
AUDOUIN L.;
BARBAGALLO M.;
BECARES V.;
BECVÁR 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 Luigi;
CHIN M.;
CLAI G.;
COLONNA N.;
CORTES G.;
CORTES-GIRALDO M. A.;
CRISTALLO S.;
DIAKAKI M.;
DOMINGO-PARDO C.;
DURAN I.;
DRESSLER R.;
ELEFTHERIADIS C.;
FERRARI A.;
FINOCCHIARO Paolo;
FRAVAL K.;
GANESAN S.;
GARCIA A. R.;
GIUBRONE G.;
GONCALVES I.;
GONZALEZ-ROMERO E.;
GRIESMAYER E.;
GUERRERO C.;
GUNSING F.;
HERNANDEZ-PRIETO A.;
JENKINS D. G.;
JERICHA E.;
KADI Y.;
KÄPPELER F.;
KARADIMOS D.;
KIVEL Niko;
KOEHLER P.;
KOKKORIS M.;
KOPECKY Stefan;
KRTICKA 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.;
MASTROMARCO M.;
MENDOZA E.;
MENGONI A.;
MILAZZO P. M.;
MINGRONE F.;
MIREA M.;
MONDELAERS Willy;
MUSUMARRA A.;
PARADELA C.;
PAVLIK Andreas;
PERKOWSKI J.;
PIGNATARI M.;
PIERSANTI L.;
PLOMPEN Arjan;
PRAENA J.;
QUESADA J.;
RAUSCHER T.;
REIFARTH R.;
RIEGO A.;
ROBLES M. S.;
RUBBIA C.;
SABATA-GILARTE M.;
SARMENTO R.;
SAXENA A.;
SCHILLEBEECKX Peter;
SCHMIDT S.;
SCHUMANN D.;
TAGLIENTE G.;
TAIN J. L.;
TARRIO D.;
TASSAN-GOT L.;
TSINGANIS A.;
VALENTA S.;
VANNINI G.;
VAN RIJS I.;
VARIALE V.;
VAZ P.;
VENTURA A.;
VERMEULEN M.;
VLACHOUDIS V.;
VLASTOU R.;
WALLNER A.;
WARE T.;
WEIGAND M.;
WEISS C.;
WYNANTS Ruud;
WRIGHT T. J.;
ZUGEC P.;
2017-04-19
ELSEVIER SCIENCE BV
JRC105879
0370-2693,
http://www.sciencedirect.com/science/article/pii/S0370269317301260,
https://publications.jrc.ec.europa.eu/repository/handle/JRC105879,
10.1016/j.physletb.2017.02.025,
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