THE ABSOLUTE DETERMINATION OF CUMULATIVE YIELDS OF SEVERAL NUCLIDES FROM 14.9MeV NEUTRON-INDUCED FISSION OF

The cumulative yields of 95Zr, 97Zr, 99Mo, 103Ru, 106Ru, 143Ce, 144Ce, 140Ba and 147Nd in the fission of 235U induced by neutrons of 14.9 MeV are determined absolutely by radio-chemical method. The 14.9 MeV neutrons are produced in the T(d, n) 4He reaction using the 600 kV Cockroft-Walton type accelerator. A rotating tritium target is used and the neutron flux is 2×1010n/s. An enriched uranium 235U(90%) is used as material of sample and standard targets. The absolute fission rate of the sample target is measured by double fission ionization chamber. Details of chemical procedure are given in a previous publication2.The cumulative yields determined by the above mentioned method are listed in following table:The errors given in the table are total errors including statistical and systematic errors.