CORDIS provides links to public deliverables and publications of HORIZON projects.
Links to deliverables and publications from FP7 projects, as well as links to some specific result types such as dataset and software, are dynamically retrieved from OpenAIRE .
Exploitable results
The facilities provided by the SRS storage ring (Daresbury Laboratory, UK) SuperACO and DCI storage rings (LURE, France), SUPERLUMI Station a HASYLAB (Germany), S-60 synchroton (Lebedev Institute, Russia) were used for the study of luminescence properties, electron energy band structure and mechanisms of the energy transfer of a variety of new materials meeting the demands of novel techniques utilising solid state detectors of radiation:
for lead tungstate crystal (chosen as a scintillator for the calorimeter of Large Hadron Collider in CERN) the mechanisms of the intrinsic luminescence were clarified, the effect of the stoichiometry on the luminescence properties and radiation hardness studied;
for a series of lutetium compounds doped by Ce or Pr (promising scintillators for PET) luminescence emission and excitation spectra as well as kinetics were studied for the first time in a wide energy range of excitations from a few electron volts to 140 eV, the role of lutetium levels in the energy transfer processes was elucidated;
Er3+ and Tm3+ emission spectra and kinetics studied in fluoride matrices (potential VUV scintillators for TMAE or TEA);
the effect of the preparative conditions on the luminescence properties of LiBaF3 pure and doped by Ce or Eu have been studied with respect to its application as a scintillator or as an optical storage material;
for crossluminescent crystals, the temperature dependence of their luminescence spectra and kinetics has been studied and the local origin of the crossluminescence phenomenon confirmed.
The luminescence phenomenon was applied to study relaxation processes in insulating crystals following high-energy excitation:
The processes specific to the relaxation of electronic excitations created by the Auger decay of core holes were studied in alkali halide crystals. The appearance of new luminescence bands which were attributed to the creation of bulk and surface defects, was observed;
The processes of multiplication of electronic excitations has been studied theoretically in the approximation of quasi free electrons, the position of the multiplication threshold has been predicted and determined and the application of this approach to cryo-crystals is now in hand;
A systematic study of the luminescence efficiency of a wide variety of insulating crystals has been undertaken in the excitation energy range 5 to 22 KeV. Departure from the expected constant energy yield which was observed in many cases, can now be explained on the basis of this work;
Work on the creation of a theoretical model to describe the dynamics of the excited regions within crystals has continued. Simulation of the excitation spectra and decay kinetics of CeF3 which can take into account the different stages of the energy transfer has been performed.
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