Zkoumání využití jodidu olova pro rentgenové detekce (bilaterální projekt s DFG Německo)

Poskytovatel: Grantová agentura ČR

Řešitel: RNDr. Jaroslav Maixner, CSc.

Koordinátor: Dr. Andreas Nicolaus Danilewsky, PhD.

Spoluřešitel: RNDr. Jiří Zavadil, CSc.

Členi: Ing. František Kostka, CSc.; RNDr. Jan Lorinčík, CSc.; Mgr. Roman Yatskiv, Ph.D.; Ing. Karel Žďánský, CSc.

Od: 2008-01-01

Do: 2010-12-31

The aim of the proposed project is the preparation of PbI₂ single crystals and optimization of their structural, electrical and optical properties in view of efficient detection of rtg radiation at room and elevated temperature up to 130°C. A modification of electro-optical properties in dependence on addition of suitable admixtures (rare earths, Au etc.) will be studied. PbI₂ material will be prepared by direct synthesis from the elements of Pb and I₂ and purified by zone melting. The Bridgman-Stockbarger growing apparatus will be used for growing single crystals. The oriented sapphire nucleus will be used to achieve the growth in the required direction. The structural properties of PbI₂ will be studied by scanning electron microscopy and high resolution X-ray diffractometry. The electrical and optical properties will be evaluated by measuring I-V characteristics, the temperature dependent Hall effect and low-temperature photoluminescence. SIMS will be used to check elemental depth profiles and GDMS for elemental analysis of bulk material. Defects will be characterized by synchrotron X-ray topography 90SRXT. The detection efficiency of prepared structures will be characterized by charge collection efficiency and by spectral resolution.