On-Beam Digital Pulse Shape Acquisition From NE102A-${\rm BaF}_{2}$ Phoswich Detector

Abstract

The use of NE102A-BaF 2 phoswich detector drastically improves the particle identification with respect to BaF 2 crystals. To better exploit the possibility of light ion discrimination we have applied digital signal processing to the signals, on-beam collected with NE102A-BaF 2 phoswich. We present the results obtained for the heavy ion charge identification (up to Z = 50) and light particle mass identification, using digital pulse shape acquisition and a 12-bit, 2 GSample/s sampling analog to digital converter. The results concerning the response of BaF 2 -plastic phoswich to the reaction products issued at forward angles in the collision of 35.1 MeV/u 124 Sn beam on 64 Ni target have been obtained at the Superconducting Cyclotron of the Laboratori Nazionali del Sud in Catania.

The european FAZIA initiative: a high-performance digital telescope array for heavy-ion studies

“…As a matter of fact, in most silicon arrays people adopted the popular "front" configuration with the junction (high field) side facing incoming ions. Recently, thanks to digital electronics and with the goal to lower ion identification thesholds, the mounting geometry of silicon detectors has been reconsidered [11,21] in order to compare the resolutions attainable in the two configurations, but conclusive tests were missing. FAZIA studied this aspect with a specific experiment where a given three-layer telescope featuring high quality silicon stages (as described in the previous sections) was used.…”

“…Since a common feature of most collisions is the production of multiparticle final states, a crucial experimental challenge is to detect and recognize at the best the many reaction products, as a preliminary necessary step to trace back to the interaction phases [8]. Recently, the detector frontier has become the isotopic identification of fragments in a wide range of kinetic energies and over large solid angles [9][10][11]. Keeping this in mind, some years ago the european FAZIA collaboration was born from a previous cooperation among groups involved in this research field at several laboratories.…”