The effect of internal conversion of nuclear fission products on their degree of ionization

The charge-state distribution of 241Pu-fission products (A = 131-145) was measured at kinetic energies of Ek = 67, 70 and 73 MeV. Smearing of the fine structure and separation of atomic and nuclear ionization effects of fission products was achieved by again changing teir charge t < 5 x 10-10 s after the fission event. The contribution of nuclear ionization effect has been shown to depend on excitation energy and on the structure of the nuclei. For some masses this contribution reaches 50%. (orig.)