New:

Our contributions at PSD-17 and PPC12 conferences

Software for digital Doppler broadening spectroscopy developed in our group is now available for free download.

Positron annihilation group

In our group we employ positron annihilation spectroscopy (PAS) for structural characterization of solids. PAS is a unique non-destructive technique with high sensitivity to open volume defects and atomic resolution. Using PAS it is possible to obtain very rich and detailed information about structural imperfections in a broad range of materials. In our group we focus mainly on the following topics:

  • defect characterization on the "atomic scale"
  • investigations of non-equilibrium defects created by irradiation or plastic deformation
  • studies of defect interactions
  • investigations of thermal stability of defects and defect recovery with increasing temperature
  • characterization of hydrogen-induced defects
  • investigations of free volumes in polymers
  • In addition, we work on development of PAS methodology, namely high-resolution positron-lifetime spectroscopy and digital techniques for precise measurement of positron lifetime and Doppler shift of annihilation gamma rays.

    Our laboratory is equipped with state-of-art PAS spectrometers with excellent parameters:

  • high-resolution digital positron lifetime spectrometer
  • high resolution and low background digital spectrometer for coincidence measurement of Doppler broadening.