Towards ion identification limit with the silicon telescopes of the FAZIA project

S Carboni

doi:10.1051/epjconf/20123100030

Abstract

The response of Si-Si-CsI(Tl) and Si-CsI(Tl) telescopes with quality controlled detectors, developed within the FAZIA collaboration, is presented. The aim of the test experiment was to explore the capabilities of various solutions exploiting digital pulse shape analysis techniques for charge and mass separation of ions stopped in a single silicon layer, in order to decrease the identification threshold. It has been found that it is possible to fully discriminate the charge of stopped ions up to the maximum available Z (slightly over that of the beam, Z=54). The ΔE-E correlation, both from the first two silicon detectors and for Si+Si vs. CsI(Tl), can identify all the isotopes up to Z=25. The radiation damage effect on these FAZIA silicon detectors has been also studied. In particular, some results about the effect due to the punching-through and stopped Xe ions will be shown and discussed.

Highlights

The response of Si-Si-CsI(Tl) and Si-CsI(Tl) telescopes with quality controlled detectors, developed within the FAZIA collaboration, is presented
The aim of the test experiment was to explore the capabilities of various solutions exploiting digital pulse shape analysis techniques for charge and mass separation of ions stopped in a single silicon layer, in order to decrease the identification threshold
A 35 MeV/nucleon 129Xe beam, delivered by the “Ciclotrone Superconduttore” (CS) of the “Laboratori Nazionali del Sud” (LNS) in Catania, was used for bombarding thin targets of natNi and Au to test the capabilities of the FAZIA telescope prototypes