Identification of 8Be Isotope in the CsI CHIMERA Detector

The present work concerns the possibility of sEe isotope identification using the 4pi CHIMERA multidetector system at LNS INFN in Catania for reactions 124Sn + 64Ni and 112Sn + 58Ni at 35A MeV (REVERSE campaign). The 8Be ion can be detected only by two alpha decay channel. All alpha particles from 8Be decay are placed in a cone with the maximum angle, which is greater than the angle covered by a single telescope of the CHIlVIERA apparatus. The 8Be can be found as a separate line on the two-dimensional plot "slow-fast" of a single CsI(Tl) detector. The other supplementary method bases on coincidences between 2 alpha particles detected in two adjoining detectors. The total number of 8Be isotopes is a sum of 8Be collected directly in the central detector (2a-line) and a half of 2 alpha particles coincidences with all neighbouring detectors. We can also get 8Be energy spectrum.