+\begin{frame}
+ \frametitle{Grundlagen}
+ \framesubtitle{Die Monte-Carlo-Simulation TRIM}
+ Abbildung der Zufallszahlen auf die physikalischen Gr"o"sen
+ \begin{columns}
+ \column{8cm}
+ \begin{pgfpicture}{0cm}{0cm}{8cm}{7cm}
+ % free path of flight l
+ \onslide<3->{
+ \color{blue}
+ \pgfxyline(1,5)(3,5)
+ \pgfputat{\pgfxy(1.75,5.1)}{\pgfbox[center,bottom]{$l$}}
+ \color{black}
+ }
+ % the atom and impact parameter p
+ \onslide<4->{
+ \pgfcircle[fill]{\pgfxy(3,6)}{0.1cm}
+ \color{red}
+ \pgfxyline(3,6)(3,5)
+ \pgfputat{\pgfxy(2.9,5.5)}{\pgfbox[right,base]{$p$}}
+ \color{black}
+ }
+ % the scattering angle theta
+ \onslide<5->{
+ \pgfmoveto{\pgfxy(3,5)}
+ \pgflineto{\pgfxy(7,2)}
+ \pgfsetdash{{0.2cm}{0.2cm}{0.2cm}{0.2cm}}{0cm}
+ \pgfstroke
+ \pgfsetdash{{1cm}{0cm}{1cm}{0cm}}{0cm} % reset dash ... strange!
+ \pgfputat{\pgfxy(3.9,4.6)}{\pgfbox[right,base]{$\Theta$}}
+ }
+ % ion + direction
+ \onslide<2->{
+ \pgfcircle[fill]{\pgfxy(1,5)}{0.1cm}
+ \pgfmoveto{\pgfxy(1,5)}
+ \pgflineto{\pgfxy(7,5)}
+ \pgfsetdash{{0.2cm}{0.2cm}{0.2cm}{0.2cm}}{0cm}
+ \pgfstroke
+ \pgfsetdash{{1cm}{0cm}{1cm}{0cm}}{0cm} % reset dash ... strange!
+ }
+ \end{pgfpicture}
+ \column{4cm}
+ \begin{itemize}
+ \item<3-> mittlere freie Wegl"ange \color{blue}{$l$}
+ \item<4-> Sto"sparameter \color{red}{$p$}\\
+ \color{black} % reset color ...
+ \onslide<5->{$\Rightarrow$ $\Theta$, $\Delta E$}
+ \item<6-> Azimutwinkel $\Phi$
+ \end{itemize}
+ \end{columns}
+\end{frame}
+