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bohr.tex
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bohr.tex
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\documentclass{standalone}
%\pagenumbering{gobble}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% HI energy level diagram
%
% 13.6eV ionization potential
% Bohr 1/n**2 levels
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage{tikz,xcolor}
\usetikzlibrary{arrows,snakes}
\begin{document}
\tikzset{
level/.style={thick},
trans/.style={thick, dashed,->,shorten >=2pt,shorten <=2pt,>=stealth},
photon/.style={thick, ->, snake=snake, line after snake=1mm}
}
\begin{tikzpicture}[scale=1.0, font=\sffamily]
% Draw the energy levels
\draw[level] (12.0,0) -- (2,0) node[left] {$n=1$};
\draw[level] (12.0,10.2) -- (2,10.2) node[left] {$2$};
\draw[level] (12.0,12.09) -- (2,12.09) node[left] {$3$};
\draw[level] (12.0,12.74) -- (2,12.74) node[left] {$4$};
\draw[level] (12.0,13.06) -- (2,13.06);
\draw[level] (12.0,13.22) -- (2,13.22);
\draw[level] (12.0,13.32) -- (2,13.32);
\draw[level] (12.0,13.39) -- (2,13.39);
\draw[level] (12.0,13.43) -- (2,13.43);
\draw[level] (12.0,13.46) -- (2,13.46);
\draw[level] (12.0,13.49) -- (2,13.49);
\draw[level] (12.0,13.51) -- (2,13.51);
% fudge and put the IP at 13.52 to show convergence
\draw[level] (12.0,13.52) -- (2,13.52) node[left] {$\infty$};
% grey box for continuum
\path[fill=gray!20] (2,13.52) rectangle (12.0,14.5);
\node[align=left] at (9.0,14.2) {\large{\bf continuum}};
% Draw scale bar on right side
\draw[thick, ->] (13.0,0.0) -- (13.0,14.5);
\draw[level] (12.9,0.0) -- (13.1,0.0) node[right] {$E=0$};
\draw[level] (12.9,10.2) -- (13.1,10.2) node[right] {$10.2$eV};
\draw[level] (12.9,13.52) -- (13.1,13.52) node[right] {$13.6$eV};
% Draw the transitions
\draw[trans] (3.4,0.0) -- (3.4,14.4);
\draw[trans] (10.0,10.2) -- (10.0,0);
\draw[trans] (9.5,12.09) -- (9.5,0.0);
\draw[trans] (9.0,13.9) -- (9.0,0.0);
\draw[trans] (8.5,12.74) -- (8.5,10.2);
\draw[trans] (8.0,13.06) -- (8.0,10.2);
\draw[trans] (7.5,14.4) -- (7.5,10.2);
\draw[trans] (7.0,12.74) -- (7.0,12.09);
\draw[trans] (6.5,13.06) -- (6.5,12.09);
\draw[trans] (6.0,13.8) -- (6.0,12.09);
\draw[trans] (5.5,13.06) -- (5.5,12.74);
\draw[trans] (5.0,13.22) -- (5.0,12.74);
\draw[trans] (4.5,14.15) -- (4.5,12.74);
% Draw the photons
\draw[photon] (1.8,6.1) -- (3.3,6.1);
\node[align=right, text width=2] at (1.8,5.8) {\small{ionizing}};
\node[align=right, text width=2] at (1.8,5.5) {\small{photon}};
\draw[photon] (10.0,5.1) -- (11.5,5.1);
\node[align=left, text width=2] at (10.3,4.8) {\small{recombination}};
\node[align=left, text width=2] at (10.3,4.5) {\small{line}};
\end{tikzpicture}
\end{document}