XI. Neutron total cross sections between 30 and 153<scp>m</scp>e<scp>v</scp>

Abstract

Abstract The neutron total cross sections of carbon, aluminium, copper, cadmium and lead have been determined as a function of energy in the range 30 to 139 mev. The lead total cross section shows a dip at about 60 mev and corresponding dips in the cadmium and copper cross sections appear to occur between 30 and 40 mev. The neutron total cross section of hydrogen has been measured as 56·9±1·8×10-27 cm2 at a neutron energy of 126±2 mev.