(n,2n) cross sections of 2H and 239Pu

Abstract The large liquid scintillator method has been used to measure the 239Pu(n,2n) cross section between threshold and 13 MeV, and the 2H(n,2n) cross section between 7.5 and 15 MeV. The 239Pu excitation function has been calculated using a statistical preequilibrium model.