New Scintillator Materials For Future And Present Facilities

摘要

In the recent years LaBr_3:Ce crystals started a new generation of high performing scintillator detectors. In fact, a large number of different, new and promising scintillators are now becoming commercially available, as for example CeBr_3, CLYC, SrI_2. Some others, like GYGAG:Ce, CLLB, CLLC, will be available in the near future. The CLYC crystal enriched with ~6Li provides extremely high efficiency for thermal neutron identification and detection with performances comparable to ~3He tubes. The CLYC enriched with ~7Li can provide the direct measurement of the neutron kinetic energy from the energy pulse signal. The most recent R&D activity shows that 'co-doping' technique has the effect to improve the crystal proportionality and the mechanical properties thus significantly increasing the reliability and energy resolution of LaBr_3;Ce and CeBr_3 scintillators. Such a new generation of detectors can be the backbone for the detectors array of the future accelerator facilities as for example ELI-NP which will provide very intense high-energy γ- ray beam with very low bandwidth.