\documentclass[a4,portrait]{seminar}
\usepackage{amssymb,colordvi,german,epsfig,pstricks,fancybox,semcolor}
%\usepackage{amssymb,german,epsfig,pstricks,fancybox}
%\usepackage[dvips]{pstcol}
\usepackage{pst-coil}
\usepackage{graphicx}

%\setlength{\slidewidth}{26cm}
%\setlength{\slideheight}{17cm}
\renewcommand{\slideleftmargin}{-2.5cm}
%\renewcommand{\slidetopmargin}{1cm}

%\definecolor{orange}{rgb}{1.0,0.55,0.25}
\newhsbcolor{myred}{0 0.8 0.9}
\newhsbcolor{myblue}{0.654 0.8 0.8}
\newhsbcolor{myorange}{0.083 0.4 1}
\newhsbcolor{mygreen}{0.32 0.8 0.6}
%\newhsbcolor{mylila}{0 0.5 0.8 0.9}

\begin{document}
\pagestyle{empty}

\slideframe{none}

\begin{slide*}      % slide* waehlt portrait format/slide waehlt landscape

% coordinates are in x,y

\unitlength1cm

\begin{picture}(7,3.6) \boldmath
%\thicklines \boldmath
% Drawing the incoming lepton
\put(1.5,3){\psline[linewidth=0.6pt]{<-}(-1,0.4)}
\put(2,2.8){\psline[linewidth=0.6pt](-0.5,0.2)}
\put(1,3.3){$\scriptstyle e(k)$}
% Drawing the outcoming lepton
\put(2,2.8){\psline[linewidth=0.6pt]{->}(0.7,0.3)}
\put(2.7,3.1){\psline[linewidth=0.6pt](0.7,0.3)}
\put(2.1,3.3){$\scriptstyle l^{\prime}(k^{\prime})$}
%\multiput(1,3.3)(1.8,0){2}{$\scriptstyle e^-$}
% Drawing the photon 
% argument of rput is the angle
\put(2.0,2.75){\rput{90}{%
\psCoil[linecolor=black,coilaspect=1,coilheight=3.5,coilwidth=0.09,
  linewidth=0.6pt]{0}{1440}
 \rput{*0}{}}}
\put(2.5,2.2){$\scriptstyle R,P$}
% Drawing the interaction
%position of the circle ------- thickness center radius
\end{picture} 



\end{slide*}
\end{document}







