Deuterium and Beryllium (n, 2n) Cross Sections Between 6 and 10 Mev

The ($n, 2n$) cross sections of deuterium and beryllium have been measured for incident neutron energies in the range from 6 to 10 Mev using a large liquid scintillator. The cross sections in barns obtained for deuterium were 0.067±0.007 at 6.11 Mev, 0.073±0.007 at 6.55 Mev, 0.088±0.009 at 7.32 Mev, 0.11±0.010 at 8.26 Mev, and 0.14±0.015 at 10.2 Mev. The beryllium cross sections were 0.55±0.08 at 6.55 Mev, 0.56±0.07 at 7.32 Mev, and 0.63±0.09 at 8.26 Mev.