Antiproton induced fission has been investigated with a novel double-a
rm fission fragment spectrometer and with a special arrangement to det
ermine absolute fission yields in various targets. The spectrometer me
asures five parameters per fission event: two masses, two energies and
the folding angle. Asymmetric, symmetric and pre-equilibrium fission
was observed. The number of nucleons emitted before and after scission
was deduced indicating fast fission of hot nuclei.