The present work reports on a systematic study of fission-fragment element yields in the fission of 70 neutrondeficient actinides and pre-actinides between 205 At and 234 U within the concept of independent fission channels . The fission channels are characterized by several parameters, e.g. the average mass or charge split, the mass or charge width, and the mean total kinetic energy, respectively the elongation of the scission configuration. We extract the values of these parameters for three fission channels from the measured data of 15 nuclides  which show features of multi-modal fission. The experiment was performed at GSI Darmstadt: Relativistic secondary projectiles were produced via fragmentation of a 1 A GeV primary beam of 238 U and identifie
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