Graph showing the Zeeman splitting in Rb-87, the energy levels of the 5s orbitals, including fine structure and hyperfine structure. Here, the quantum number F = J + I, where I is the nuclear spin. (for Rb-87, I = 3/2). The original splitting is due to zero-field fine structure + hyperfine splitting. Graph was produced in MATLAB by plotting the Breit-Rabi equation. The code can be viewed here: <a rel="nofollow" class="external free" href="https://github.com/delton137/Breit_Rabi_Zeeman_Plotter">https://github.com/delton137/Breit_Rabi_Zeeman_Plotter</a>
<a href="//commons.wikimedia.org/wiki/User:%D0%94.%D0%98%D0%BB%D1%8C%D0%B8%D0%BD" title="User:Д.Ильин">Д.Ильин</a>: vectorization, translation
<a href="//commons.wikimedia.org/wiki/File:Breit-rabi-Zeeman.png" title="File:Breit-rabi-Zeeman.png">File:Breit-rabi-Zeeman.png</a> by <a href="//commons.wikimedia.org/wiki/User:Danski14" title="User:Danski14">Danski14</a>