26-30 June 2011
Centro Culturale Altinate, Padova, Italy
Europe/Rome timezone

Status and perspectives of detector arrays of LaBr3:Ce

27 Jun 2011, 11:55
25m
Sala Polivalente (Centro Culturale Altinate, Padova, Italy)

Sala Polivalente

Centro Culturale Altinate, Padova, Italy

Via Altinate 71 Padova Italy

Speaker

Franco Camera (INFN and Univ. of MI)

Description

In the most recent years large volume LaBr3:Ce crystals have become available. The interest of the scientific community toward such kind of crystals is connected to its excellent scintillation properties. In fact, the LaBr3:Ce is an inorganic material which, when doped with 5% Cerium, shows the best energy resolution among all scintillators (2.7% a 661 keV) and an excellent subnanosecond time resolution. The LaBr3:Ce effective atomic number is high because of Lanthanum (Z=57) and its density is 5.1 g/cm3 which has to be compared with that of NaI (3.67 g/cm3), BGO (7.13 g/cm3) and HPGe (5.32 g/cm3) [1-3]. In addition, the crystal shows good temperature stability [4] and linearity in the production of scintillation light [5]. The first cylindrical 3" x 3" crystals have been produced in 2006 while in 2007 it was possible to reach the size of 3" x 6". In 2008 the first 3.5" x 8" detector has been delivered to Milano. Up to now we have received 6 large volume 3.5”x8” LaBr3:Ce crystals and for the end of the year an array of 10 of such detectors is planned to be ready to measure. Such a system can be coupled to an HPGe array either to significantly increase its coincidence efficiency keeping a selectivity in -rays energy or in a standalone mode in case peak density is low enough or background it extremely high. An overview of the R&D activity for the optimization of the performances of these detectors, of the tests with high energy g-rays and its expected performances will be given.

Primary author

Franco Camera (INFN and Univ. of MI)

Presentation Materials