  The optical properties of a small magnetic cluster are studied in a magnetic
version of Frank-Condon principle. This simple model is considered to show new
basic physics and could be adopted to treat real problems. The energies and
wavefunctions of the cluster are calculated for different spin configurations
to evaluate the energies and the strengths of the allowed transitions from the
relaxed excited states. The optical de-excitation energies for the likely
scenarios are obtained in terms of the exchange parameters of the model.
