RADIOCHEMICALLY DETERMINED RATIOS OF ASYMMETRIC TO SYMMETRIC FISSION OF U233, Pu239, and u235 AS A FUNCTION OF NEUTRON ENERGY

摘要

In summary, the following observations may be made concerning fission symmetry In the low-energy region:n1. The asymmetric to symmetric fission ratio for neutron-induced fission in the low-energy resonance region does change from resonance to resonance.n2. The ratios appear to fall into two symmetry classes each of which has a characteristic peak-to-valley mass yield ratio.n3. The largest observed difference between the twon239 symmetry classes is found in Pu239.