Production of neutrons by high speed deutons

In a recent letter to the Physical Review(1) we described briefly an apparatus for the acceleration of positive ions and the production of neutrons by bombarding beryllium with helium ions of from 600,000 to 975,000 electron-volts energy. Since then we have bombarded targets of lithium chloride and beryllium with deutons of energies up to 900,000 electron-volts, and have obtained in both cases yields of neutrons several hundred times as great as the yield previously obtained by bombarding beryllium with helium ions.