THE ABSOLUTE DETERMINATION OF THE SPONTANEOUS FISSION YIELD OF 252Cf BY RADIOCHEMICAL METHOD.

The distribution of mass in the spontaneous fission of 252Cf was investigated by the radiochemical determination of the absolute fission yield for 35 mass chains. A summation of the mass-yield curve gives a value of 199.4% which is in very good agreement with the value of 200 % in fission. The mean masses of the light and heavy group are located at 106.39 and 141.82 respectively. The average of neutron number per fission (v) is 3.79±0.12. The peak-to-valley ratio is≥370.