# Example for Positron Life Time Measurement in Ag

| Here is an example for a positron life time measurement.
| From Dr. Wolf; one of the researchers in the group of Prof. Faupel in Kiel
|  | The "S-curve" is clearly visible; the linearly rising part is simply due to thermal expansion which decreases the electron density and thus increases the positron lifetime.

With frame

4.1.1 Experimental Techniques for Studying Point Defects

© H. Föll (Defects - Script)