The reaction 13C(alpha,n)16O: a background for the observation of   geo-neutrinos
  The absolute cross section of the $^{13}$C($\alpha$,n)$^{16}$O reaction has been measured at E$_{\alpha}$ = 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. 
S. Harissopulos, H. W. Becker, J. W. Hammer, A. Lagoyannis, C. Rolfs,   F. Strieder