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.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 LUIGICHIN 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 PAOLOFRAVAL 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 NIKOKOEHLER P.KOKKORIS M.KOPECKY STEFANKRTICKA 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 AMARGANIEC J.MARTÍNEZ T.MASTINU P.MASTROMARCO M.MENDOZA E.MENGONI A.MILAZZO P. M.MINGRONE F.MIREA M.MONDELAERS WILLYMUSUMARRA A.PARADELA C.PAVLIK ANDREASPERKOWSKI J.PIGNATARI M.PIERSANTI L.PLOMPEN ARJANPRAENA J.QUESADA J.RAUSCHER T.REIFARTH R.RIEGO A.ROBLES M. S.RUBBIA C.SABATA-GILARTE M.SARMENTO R.SAXENA A.SCHILLEBEECKX PETERSCHMIDT 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 RUUDWRIGHT T. J.ZUGEC P.
Citation: PHYSICS LETTERS B vol. 768 p. 1-6
Publisher: ELSEVIER SCIENCE BV
Publication Year: 2017
JRC N°: JRC105879
ISSN: 0370-2693
URI: http://www.sciencedirect.com/science/article/pii/S0370269317301260
http://publications.jrc.ec.europa.eu/repository/handle/JRC105879
DOI: 10.1016/j.physletb.2017.02.025
Type: Articles in periodicals and books
Abstract: 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⊙.
JRC Directorate:Nuclear Safety and Security

Files in This Item:
There are no files associated with this item.


Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.