2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/178151The absolute cross section of the $^{13}$C($α$,n)$^{16}$O reaction has been measured at E$_α$ = 0.8 to 8.0 MeV with an overall accuracy of 4%. The precision is needed to subtract reliably a background in the observation of geo-neutrinos, e.g. in the KamLAND detector.LaTex file, 13 pages including 3 ps figures. Any request to sharisop@inp.demokritos.gr. Phys. Rev . C, to appearNuclear Experimenttext