tracks in the detectors. Two such decays, also from a nickel-nickel reaction at 1.93 GeV per nucleon, are visible in Figure 1. It can be seen that not all of the tracks originate from the same point. The [...] detector systems, the total assembly achieves its goal of covering the complete range of beam energies (0.1 - 2 GeV per nucleon) made available by GSI's SIS heavy ion synchrotron. The target is located within [...] The energy loss is dependent on the type of particle and its momentum in a characteristic way. Figure 1 gives an impression of the available information. This shows the signals ("hits") as squares in a plane
