Photoluminescence and scintillation properties are reported for SrCl2?xBrx:Yb2+ (x = 0, 0.3, 1.4, 1.6, 2.0) crystals grown by a self-seeding solidification method. SrCl2?xBrx have been to crystallize in some structural types with different local site symmetries depending on the Cl/Br ratio. Taking advantage of this property, we can control crystal structure Yb2+ symmetry changing compositions i...

Data taken by CRESST in 2000 with a cryogenic detector system based on 262 g sapphire crystals is used to place limits on WIMP dark matter in the Galactic Halo. The detector is especially sensitive for low-mass WIMPS with spin-dependent cross sections and improves on existing limits in this region. CRESST is now preparing for a second phase, which will use a 10 kg detector consisting of 300 g C...

The authors consider detection of high-energy photons in positron emission tomography using thick scintillation crystals. Parallax effect and multiple Compton interactions in such crystals significantly reduce the accuracy of conventional detection methods. In order to estimate the photon line of flight based on photomultiplier responses, the authors use asymptotically optimal nonlinear techniq...

Ce-doped lanthanum gadolinium pyrosilicate are among the most efficient oxide scintillation crystal with a light yield of ca. 40000 ph./MeV and high energy resolution. Meanwhile, process obtaining...