Results of tests on NaI scintillation crystals operated at cryogenic temperatures are described. Crystals grown using both the Bridgeman-Stockbarger and Czochralski techniques were tested. Light output and scintillation pulse shape properties are assessed as functions of temperature using gamma and 252 Cf neutron sources and the results are interpreted with a view to optimising detector perform...

In this paper we describe a semianalytical approach to computing the temperature and thermal stress inside a III-V compound grown with the Czochralski technique. An analysis of the growing conditions indicates that the crystal growth occurs on the conductive time scale. A perturbation method for the temperature field is developed for an arbitrary crystal profile using the Biot number as a (smal...

Mg, Fe co-doped near-stoichiometric lithium tantalite (SLT) single crystals were grown by employing the zone-leveling Czochralski (ZLCz) technique. The optical properties, holographic parameters, as well as the composition of the grown crystals were measured. It was found that the Li/Ta ratio decreased with the doping of Mg and Fe ions. A red shift was observed in absorption spectrum for the Mg...

We have prepared single crystals of PrCr2Si2C and NdCr2Si2C by Czochralski technique and investigated them by heat capacity and magnetization measurements in the temperature range 2–300 K and magnetic fields up to 6 T applied parallel to the principal crystallographic axes. Both compounds exhibit the strong magnetocrystalline anisotropy with the tetragonal c-axis as the easy direction of magnet...

We report on the investigation of the radiation damage induced by neutron irradiation on both nand p-type Magnetic Czochralski silicon pad detectors by the Thermally Stimulated Currents (TSC) technique. Detectors have been irradiated with fast neutrons in the range 10 14 -10 16 n/cm 2 . Priming conditions have been studied in detail in order to investigate the residual electric field due to fro...

The LUMINEU program aims at performing a pilot experiment on neutrinoless double beta decay of Mo using radiopure ZnMoO4 crystals operated as scintillating bolometers. Growth of high quality radiopure crystals is a complex task, since there are no commercially available molybdenum compounds with the required levels of purity and radioactive contamination. This paper discusses approaches to puri...

In this paper, we present a model for grown-in point defects inside indium antimonide crystals grown by the Czochralski technique. Our model is similar to the ones used for silicon crystal, which includes the Fickian diffusion and a recombination mechanism. This type of models is used for the first time to analyze grown-in point defects in indium antimonide crystals. The temperature solution an...

We have irradiated Czochralski silicon (Cz-Si) and Float Zone silicon (Fz-Si) detectors with 24GeV=c and 10MeV protons. Samples were characterized with Capacitance-Voltage measurements (CV), Transient Current Technique (TCT) and secondary electron backscattering recorded by Scanning Electron Microscope (SEM). We present the evolution of the effective doping concentration as a function of irradi...