===== Note =====

== Morse potential ==
<code>
Manipulate[
 Plot[
  (1 - Exp[-a (r - R)])^2,
  {r, 0, 5}, PlotRange -> {-1, 2}]
 , {{a, 2}, 0, 10}, {{R, 2}, 0, 10}]
</code>

=== Reference ===
Wikipedia:
[[https://en.wikipedia.org/wiki/Morse_potential|Morse potential]]

-----
=== Related ===
[[Classical Hamiltonian system]]