Local Elemental Analysis of Nano- and Subnano-Scale Area by Positron Annihilation Spectroscopy

Positron Annihilation Spectroscopy

Positron annihilation spectroscopy is nowadays well recognised as a powerful tool of microstructure investigations of condensed matter. An overview of the method aimed for users from other fields is given and supplemented with several examples of applications.

Positron annihilation lifetime spectroscopy in nickel ferrite and iron oxide nanopowders

In this study, a positron annihilation lifetime spectrometer was set up and its resolution was optimized. The spectrometer is a fast-slow arrangement with time resolution of 250 ps. To obtain lifetime components and their intensities from analyzing positron annihilation lifetime spectrum, the Pascual software is used. Positrons are from a source of radioactive 22NaCl with 20 μCi activity enclos...

Single shot positron annihilation lifetime spectroscopy

Recent developments in positron trapping technology have made possible experimentation with dense interacting positronium gases. Along with these capabilities comes a need for suitable measurement techniques, and accordingly we have developed a method to measure positronium lifetimes from a single intense burst of positrons. Our method is based on recording the anode signal from a photomultipli...

Study of Cs-loaded SiO2 glass by thermal analysis and positron annihilation spectroscopy

1 AP / P 5 - 05 Applications of Positron Annihilation Spectroscopy

Positron annihilation spectroscopy techniques are well established nuclear techniques with applications which nowadays range from structural investigations of materials to investigations of biological samples and medical imaging. They have extensively been used more than thirty years, but with constant improvements in measuring methods and with new applications, especially in investigations of ...