The nuclear charge distribution of fission products of thermal neutron induced fission of /sup 235/U

Nuclear charge distributions of mass separated light fission products, 79<A<103, have been measured at various kinetic energies and ionic charges using a surface barrier Delta E-silicon detector. After averaging over all energies and ionic charges a very pronounced proton odd-even effect and a smaller neutron odd-even effect is found which results in periodical variations of the average nuclear charge, the variance, the skewness, and the excess. The principles of the variations of the nuclear charge distributions due to varying kinetic energies are discussed. (20 refs).