WKB METHOD FOR RESONANCES

For the potentials with a barrier the analytical continuation of the B ohr - Sommerfeld quantization rule into the region of overbarrier reso nances is derived. The equations obtained are valid for an arbitrary a nalytical potential satisfying the quasiclassical conditions and deter mine both the position of resonance E(r) and its width GAMMA. The resu lts are demonstrated for a number of model potentials and also for the Stark effect in a strong field. The energy asymptotic of resonances i n the strong coupling regime is found.