Polarization Bremsstrahlung in collissions of fast ions with multiatomic targets

TL;DR

This paper investigates polarization bremsstrahlung during collisions of fast ions with linear atomic chains, revealing interference effects that significantly alter radiation spectra and angular distributions, with implications for surface and solid-state physics.

Contribution

It provides new calculations of radiation intensities and angular distributions for multiple atoms in a chain, extending understanding of polarization bremsstrahlung beyond isolated atoms.

Findings

Interference causes notable changes in spectral angular distributions.

Derived estimates of energy loss due to radiation (radiative friction).

Results applicable to ion channeling above surfaces and in solids.

Abstract

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.