  We propose a simple method to evaluate $\alpha$-transition rates to low-lying
excited states in even-even nuclei. For this a realistic $\alpha$-daughter
double folding interaction is approximated by a parabola in the region where
the decay process takes place. This allows us to evaluate the penetration
probability analytically. The main experimental features of branching ratios to
excited states are reproduced by this simple approach.

Nuclear Theory