FAZA device for investigation of multiple emission of intermediate mass fragments in nucleus-nucleus interactions

The 4π detector for the investigation of multiple emission of the intermediate mass fragment in nucleus-nucleus collisions is described. The device includes 64 scintillation counters with thin layers of CsI(Tl) and five telescope-spectrometers of fragments. These telescopes consist of a flat proportional counter, ionization chamber and Si(Au) detector. The paper includes also the data obtained with the use of one module of the device. The module was composed of telescope-spectrometer and two scintillation counters with thin (∼ 12 mg/cm2) layers of CsI(Tl). The experiments were performed on 4He and 12C beams (3.6 GeV/nucleon). The yield of the fragments in a Zf function of atomic number when irradiating Ta with 4He beam was measured. 17 refs.; 11 figs