Radiation of the atomic chains exited by a channeling particle

TL;DR

This paper investigates the radiation emitted by atomic chains excited by a channeling particle, revealing that the main radiation frequency is Doppler-shifted oscillation frequency and that the emission is highly directional due to coherence.

Contribution

It introduces a simple two-dimensional crystal lattice model to analyze atomic chain radiation and demonstrates the dominant frequency and angular distribution characteristics.

Findings

Radiation primarily occurs at the Doppler-shifted oscillation frequency.

Angular distribution is sharply peaked in the direction of the channeling particle.

Coherence of atomic fields causes the directional radiation pattern.

Abstract

Basic properties of radiation of the atomic chains excited by a channeling particle are considered. Using a very simple two-dimensional model of a crystal lattice we have shown that the main part of this radiation is generated on the frequency of oscillations of a channeling particle between the crystal planes, shifted by the Doppler effect. Angular distribution of the radiation of the chain of oscillating atoms is sharply peaked in the direction of the velocity of channeling particle because of coherence of the fields, produced by individual atoms.