New class of indium-containing room temperature inorganic scintillators

International audienceIn spite of intensive study during recent years, efficient room temperature operating inorganic crystalline scintillating materials based on indium were not mastered yet. These materials could be very important to eventually perform experiments for low-energy neutrinos detection. Here, we report on the scintillation properties of a class of indium containing scintillating materials: indium-based tungstates. The following materials have been investigated: LiIn(WO4)2, NaIn(WO4)2, In6WO12 and CaIn2O4, either pure or terbium-doped. These compounds were produced in the form of powder by solid-state synthesis. They were identified by X-ray diffraction as single-phase materials. Among studied materials, undoped NaIn(WO4)2, and LiIn(WO4)2 scintillators show the most promising scintillation characteristics at room temperature. Light yield of both materials was measured as about 30% of BGO. Emission maximum is located about 490 nm.Scintillation decay is three-exponential with time constants of about 10, 100, and 500 ns. Some of the other ternary indium oxides also show bright but slow scintillations when doped with terbium

Studying the kinetics of radiation damage in PWO crystals for the CMS electromagnetic calorimeter (CERN)

The influence of the irradiation of PWO crystals on the characteristic timing parameters of changes in their optical transparency and subsequent recovery during the working cycle of the LHC accelerator (CERN) was studied. PWO crystals were irradiated with a working dose corresponding to the radiation load in the electromagnetic calorimeter. A method for evaluating the influence of the change in the optical transparency of scintillation crystals on the statistical term in the energy resolution of the electromagnetic calorimeter in intense radiation fields is proposed. This method is applied to the development of the technology of mass production of radiation-hard scintillation crystals used in electromagnetic calorimetry and to its certification

Analysis of ACCOS system results reproducibility and results of first pre-mass production PWO certification

This paper is more particularly directed towards the website as a place of organization,information and coordination for the actions of both the fight for the “Alternative Libertaire” on the side of arnarchism and of the “ Nouvelle résistance” for the Nationalist and revolutionary leanings located on the far right wing. Those movements are characterized by a weakness in the number of their militants, by the fact that the wills are too dissipated on a geographical level, and finally by their relative discretion or anonymity. Those constraints in the organization do find a providential place through the internet. the website shall become rather than a way of communication, a real militant platform