  Working in a perturbative QCD model approach, we obtain the essential form
factor of the radiative transition $B \rightarrow V^{*} \gamma$ and estimate
the branching ratio $BR(B \rightarrow K^{*} \gamma)$. The results are
determined by a parameter expressing the momentum distribution in the $B$ -
meson wave function. Our estimations are compared to other theoretical
predictions as well as to experimental data.
