PROJECT DETAILS
Name: |
|
Investigation of Lead Iodide for X-ray Detection (bilateral project with DFG Germany) |
Principal investigator: |
|
Jaroslav Maixner, Ph.D. |
Coordinator: |
|
Dr. Andreas Nicolaus Danilewsky, PhD. |
From: |
|
2008-01-01 |
|
To: |
|
2010-12-31 |
The aim of the proposed project is the preparation of PbI
2 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. PbI
2 material will be prepared by direct synthesis from the elements
of Pb and I
2 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 PbI
2 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.