Generalized nuclear polarizabilities in (e,e'γ) coincidence experiments

The (e, e'γ) coincidence cross section is expressed in terms of the nuclear polarizabilities as a generalization of the standard (γ, γ') formalism for polarized photons. This formalism is well suited to determine nuclear spins in a model-independent way. Due to the presence of virtual photons of longitudinal and transverse polarization and variable momentum transfer, electroexcitation gives more complete information than scattering of real photons and allows one to study the polarizabilities as function of excitation energy and momentum transfer.