Massimi, C.Altstadt, S.Andrzejewski, J.Audouin, LBarbagallo, MBecares, VBecvar, FBelloni, FBerthoumieux, E.Billowes, J.Bisterzo, SaraBosnar, D.Brugger, MCalviani, MCalvino, FWallner, Anton2021-08-182021-08-180370-2693http://hdl.handle.net/1885/244012This work reports on accurate, high-resolution measurements of the 25Mg()26Mg and 25Mg() cross sections in the neutron energy range from thermal to about 300 keV, leading to a significantly improved 25Mg()26Mg parametrization. The relevant resonances for 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 26Mg. With this information experimental upper limits of the reaction rates for 22Ne()25Mg and 22Ne()26Mg were established, potentially leading to a significantly higher ratio than previously evaluated. The impact of these results has been studied for stellar models in the mass range 2 to 25 .Funded by SCOAPapplication/pdfen-AU© The Author(s) 2017https://creativecommons.org/licenses/by/4.0/s ProcessNeutron spectroscopyNeutron spectroscopy of 26Mg states: constraining the stellar neutron sources 22Ne(a,n)25Mg201710.1016/j.physletb.2017.02.0252020-11-23Creative Commons License (Attribution 4.0 International)