  We consider the processes of polarization bremsstrahlung in collisions of
fast ions with linear chains consisting of isolated atoms. We obtained
intensities and angular distributions of radiation spectra for arbitrary number
of atoms in the chain. It appeared that interference in the photon radiation
amplitudes lead to prominent variation of spectral angular distributions of
polarization bremsstrahlung as compared to these distribuitions in collisions
with an isolated atom. The mean loss of energy due to radiation or the
so-called rediative friction is estimated. The results obtained permit standard
generalization to the case of polarization bremsstrahlung in fast ion
chanelling above surfaces an and in solid body.

Atomic Physics;Quantum Physics