The interference effect of laser-assisted bremsstrahlung emission in Coulumb fields of two nuclei

TL;DR

This paper investigates how intense laser fields influence bremsstrahlung emission from electrons scattered by two nuclei, revealing interference effects dependent on multiple parameters, with potential applications in probing atomic and molecular structures.

Contribution

It provides a detailed analysis of interference effects in laser-assisted bremsstrahlung from two nuclei using the Dirac-Volkov formalism, highlighting the dependence on various physical parameters.

Findings

Distinctive fringes in the harmonic spectrum due to interference

Dependence of interference patterns on internucleus distance and orientation

Potential for probing dressed atomic and molecular potentials

Abstract

In this paper, the spontaneous bremsstrahlung emission from an electron scattered by two fixed nuclei in an intense laser field is investigated in details based upon the Volkov state and the Dirac-Volkov propagator. It has been found that the fundamental harmonic spectrum from the electron radiation exhibits distinctive fringes, which is dependent not only upon the internucleus distance and orientation, but also upon the initial energy of the electron and the laser intensity. By analyzing the differential cross section, we are able to explain these effects in terms of interference among the electron scattering by the nuclei. These results could have promising applications in probing the atomic or molecular dressed potentials in intense laser fields.