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Passing mass separated recoil fission particles through a AE Si-surface barrier detector the nuclear charge distributions of fission products were measured in the mass chains 79 to 100. The average nuclear charge as well as the second, third, and fourth moment of the nuclear charge distribution reveal odd-even and shell effects.NUCLEAR REACTION, FISSION U(n, h, f), measured nuclear charge distribution of A = 79 to A =100, deduced element and isotone yields, proton and neutron odd-even effect.

An intrinsic germanium detector was used to measure the beta endpoint energies of heavy fission products supplied by the on line mass separator OSTIS installed at the high flux reactor of the Institut Max von Laue-Paul Langevin, Grenoble. The endpoints of singles-spectra have been determined and, by means of beta-gamma coincidence measurements also most of the Ot~-values of the following neutron-rich nuclides could be deduced with high accuracy:

The beta-decay energy of 20 nuclides in the mass region 88 _

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