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In order to simplify the electronic chain with respect to the traditional one, we decided to apply Digital Pulse Shape Acquisition (DPSA) to collect signals from the ΔE and E stages of a monolithic silicon detector telescope, directly from the preamplifier. The collected pulse shapes are digitally processed in order to obtain the physical observables. To verify the device capability of position measurement we have bombarded the 16 strips in different points along the vertical position as well as in some points from the centre of the strip. The position information has been deduced from the signal induced on different strips by the charge collected in the E stage of the telescope. In order to explain the behavior of the induction signals, a basic model of charge generation in the monolithic telescope and of the induction for different irradiation is presented.

The capability of digital pulse shape technique to acquire data from CHIMERA detection cells (Si-CsI(Tl) telescopes) has been evidenced in our previous works. We have now applied this technique to the charge discrimination of the products stopped in the silicon detectors. Large area totally depleted CHIMERA planar silicon detectors (5 cmtimes5 cm area, 300 mum thick) in both rear and front side injection have been used. In preliminary tests full charge identification for the reaction products up to Z=11 have been obtained for products both crossing (DeltaE-E technique) and stopping in the silicon detector, using a 21 MeV/u 20Ne beam at the LNS Superconducting Cyclotron in Catania. The quality of the obtained results clearly indicates that the digital signal processing approach is able to give excellent results in this application, too

Isotopic identification of nuclear products in heavy-ion physics with stable and exotic beams (RIB) is of crucial importance for understanding the behaviour of nuclear matter far away from normal density. This is true for both nuclear structure and nuclear reaction studies. The recent upgrading of the 4pi CHIMERA detector by pulse shape methods in silicon detectors in connection with the time of flight (TOF) and the energy loss (DE-E) methods allows for light charged particles and light fragments (Z < 10) identification in a broad kinetic energy range from the Coulomb barrier up to tens of MeV/nucleons. After a brief discussion of the experimental methodology used in the detector to identify the particles some relevant applications in the field of nuclear reaction studies with stable and exotic beams.