- HZDR e- accelerator ELBE with adjustable repetition rate of about 10-20 MHz , produce bremsstrahlung
- Convert hard X-rays into electron-positron pairs inside the sample of interest Wait for positron annihilation.
- Detect energy and time of arrival of both annihilation quanta
- Reconstruct image of annihilation sites and gate on positron lifetime.
Non-Destructive Testing
for Material Analysis with Positron Life Time Spectroscopy
Very first experiment
A sample consiting of Si/Si02 was irradiated with Bremsstrahlung photons (top left) and lifetime-gated image A) is obtained as ratio of long lifetimes B) to all lifetimes C).
