A. Tutay1, H. Fuchs2, H. Homeyer2, A. Budzanowski3, G. Pausch4, A. Siwek3, A. Taymaz1
1 University of Istanbul TR-34459 Vezneciler, Istanbul, Turkey,
2 Hahn-Meitner-Institut Berlin GmbH D14109 Berlin (HMI), Germany,
3 Institute of Nuclear Physics, 152 Radzikowskiego Str., 31-342 Krakow, Poland,
4 Forschungszentrum Rossendorf Postfach 510119, D-01314 Dresden, Germany
The multidetector array ARGUS in its final version comprising 128 detectors, mostly of phoswich type, was used to observe fragments from reactions of 30 AMeV32S with 58Ni. The energy calibration for protons and a-particles was made in a dedicated experiment with an 80 MeV 4He beam on a formvar target yielding mono-energetic light particles. For the intermediate-mass fragments (Z = 3 to 16) the calibrations were extracted from the S + Ni data themselves, exploiting i) the punch-though points of the respective particles, ii) the matching of phoswich spectra to solid-state detector spectra at the same polar angle. Within a group of phoswich detectors of identical shape, calibration coefficients for given Z are found to have a practically constant ratio to the coefficients for a-particles, permitting the use of a-particles as a reference in calibration.