Polarization Phenomena in Small-Angle Photoproduction of e+e- Pairs and   the GDH Sum Rule
  We discuss a possibility to measure the spin-dependent part of the forward Compton scattering amplitude through interference effects of the Bethe-Heitler and virtual Compton scattering mechanisms in photoproduction of e+e- pairs at small angles. 
A.I. L'vov (Moscow), S. Scopetta (Perugia and Mainz), D. Drechsel, S.   Scherer (Mainz)