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%% 
%%  A DANTE-Edition example
%% 
%%  Example 36-00-58 on page 791.
%% 
%%  Copyright (C) 2011 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{375.57637pt}
\setlength\parindent{0pt}
\usepackage[utf8]{inputenc}

\usepackage{pstricks,pst-node}
\definecolor{lila}{rgb}{0.6, 0.2, 0.5}
\definecolor{darkyellow}{rgb}{1, 0.9, 0}

\begin{document}
\psset{nodesep=3pt}
The binding energy in the droplet model consists of the following parts:

\begin{itemize}
\item the \rnode{b}{\psframebox[linecolor=lightgray]{surface fraction,}}
\item the \rnode{a}{\psframebox[linecolor=darkyellow]{volume fraction,}}\\[0.5cm]
\def\xstrut{\vphantom{\frac{(A)^1}{(B)^1}}}
\begin{equation}
E =
\rnode[t]{ae}{\psframebox*[fillcolor=darkyellow,
  linestyle=none]{\xstrut a_vA}} +
\rnode[t]{be}{\psframebox*[fillcolor=lightgray,
  linestyle=none]{\xstrut -a_fA^{2/3}}} +
\rnode[t]{ce}{\psframebox*[fillcolor=green,
  linestyle=none]{\xstrut -a_c\frac{Z(Z-1)}{A^{1/3}}}} +
\rnode[t]{de}{\psframebox*[fillcolor=cyan,
  linestyle=none]{\xstrut -a_s\frac{(A-2Z)^2}{A}}} +
\rnode[t]{ee}{\psframebox*[fillcolor=yellow,
  linestyle=none]{\xstrut E_p}}
\end{equation}\\[-0.2cm]
\item the \rnode{c}{\psframebox[linecolor=green]{Coulomb fraction,}}
\item the \rnode{d}{\psframebox[linecolor=cyan]{symmetry energy,}}
\item and a \rnode{e}{\psframebox[linecolor=yellow]{pairing fraction.}}
\end{itemize}
\psset{linecolor=darkgray,linewidth=0.5pt,arrowscale=1.5}
\nccurve[angleA=-90,angleB=90,linecolor=darkyellow]{->}{a}{ae}
\nccurve[angleB=45,linecolor=lightgray]{->}{b}{be}
\nccurve[angleB=-90,linecolor=green]{->}{c}{ce}
\nccurve[angleB=-90,linecolor=cyan]{->}{d}{de}
\nccurve[angleB=-90,linecolor=yellow]{->}{e}{ee}
\end{document}