\begin{tikzpicture}

\def \s{0.05}
\def \h{0.25}

% levels j=5/2
\draw[] (0, 0 * \h) -- ++(1, 0);
\draw[] (0, 0 * \h + \s) -- ++(1, 0);

\draw[] (0, 1 * \h) -- ++(1, 0);
\draw[] (0, 1 * \h + \s) -- ++(1, 0);

\draw [>=latex, <->] (1.0 + \s, 0) --  (1.0 + \s, 1 * \h + \s)
    node[pos=0.5,right=0pt]{$\delta_1$};

\draw[] (0, 2 * \h) -- ++(1, 0);
\draw[] (0, 2 * \h + \s) -- ++(1, 0);

\draw [>=latex, <->] (1.5 + \s, 0) --  (1.5 + \s, 2 * \h + \s)
    node[pos=0.5,right=0pt]{$\delta_2$};

\draw [decorate,
    decoration = {brace}] (-\s, 0) --  (-\s, 2 * \h + \s)
    node[pos=0.5,left=0pt]{$j=5/2$};

% levels j=7/2
\draw[] (0, 5 * \h) -- ++(1, 0);
\draw[] (0, 5 * \h + \s) -- ++(1, 0);

\draw[dash pattern=on \pgflinewidth off 1.0pt] (0.5, 5 * \h + 2 * \s) -- (0.5, 7 * \h);

\draw[] (0, 7 * \h + \s) -- ++(1, 0);

\draw [decorate,
    decoration = {brace}] (-\s, 5 * \h) --  (-\s, 7 * \h + \s)
    node[pos=0.5,left=0pt]{$j=7/2$};

\draw [>=latex, <->] (-0.5, 2 * \h) --  (-0.5, 5 * \h + \s)
    node[pos=0.5,left=0pt]{$\Delta$};

\end{tikzpicture}