\section{Results}
In the positronium experiment we measured the time spectrum of a positronium decay. \\

For the positron in aluminium we find a small life time. The fit gives us:

\begin{center}
$\tau = 0.134(10) ns$
\end{center}
According to the manual of this experiment we should see a lifetime of $100 - 200 ps$. So our result appears to be correct.\\
\\

In POM positronium forms and we measured for the lifetimes of ortho- and para-positronium:

\begin{center}
\begin{align*}
\tau_{para} = 0.246(5) ns\\
\tau_{ortho} = 1.800(34) ns
\end{align*}
\end{center}