A novel Si strip array to investigate reaction and decay mechanisms

The performance of a novel Set-Lip of double-sided silicon micro-strip detectors (DSSD) developed for the GSI-R3B project (reaction studies with relativistic radioactive beams) is presented. The set-Lip was used in an experiment aimed at measuring the two-proton decay of Mg-19. This experiment required to record Simultaneously protons and the residual nuclei with good position and energy resolution. Our experimental results show that both protons and heavy ions ranging from Z = 2 up to Z = 12 can be identified with good signal-to-noise ratio and high energy and spatial resolution. This allowed to reconstruct 2- and 3-particle vertices with high precision, opening the possibility to measure lifetimes of very short-lived nuclei and to obtain precise angular correlations of the Outgoing particles. This detection system serves Lis a prototype for the R3B recoil detector, which will be composed of a two-layer Si strip tracker. (c) 2008 Elsevier B.V. All rights reserved.