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The observation of $^{26}$Al gives us the proof of active nucleosynthesis inthe Milky Way. However the identification of the main producers of $^{26}$Al isstill a matter of debate. Many sites have been proposed, but our poor knowledgeof the nuclear processes involved introduces high uncertainties. In particular,the limited accuracy on the $^{25}$Mg($\alpha$,n)$^{28}$Si reaction crosssection has been identified as the main source of nuclear uncertainty in theproduction of $^{26}$Al in C/Ne explosive burning in massive stars, which hasbeen suggested to be the main source of $^{26}$Al in the Galaxy. We studiedthis reaction through neutron spectroscopy at the CN Van de Graaff acceleratorof the Legnaro National Laboratories. Thanks to this technique we are able todiscriminate the ($\alpha$,n) events from possible contamination arising fromparasitic reactions. In particular, we measured the neutron angulardistributions at 5 different beam energies (between 3 and 5 MeV) in the\ang{17.5}-\ang{106} laboratory system angular range. The presented resultsdisagree with the assumptions introduced in the analysis of a previousexperiment.

A new study of $^{25}$Mg($\alpha$,n)$^{28}$Si angular distributions at $E_\alpha$ = 3 - 5 MeV