Total Neutron Cross Sections of Na, K, and Ca from 0.9 Mev to 2.1 Mev

The total neutron cross sections of sodium and potassium have been measured for neutron energies from 0.9 Mev to 1.7 Mev at intervals of 5 kev, with an energy resolution of about 5 kev. Total cross sections of sodium, potassium, and calcium have been measured at intervals of 50 kev from 1.25 Mev to 2.1 Mev, using an energy resolution of about 65 to 75 kev. A neutron time-of-flight method was used in both sets of measurements.