A Quasiclassical Approximation in the Theory of the Landau-Pomeranchuk Effect

TL;DR

This paper demonstrates that using a quasiclassical approximation for electron multiple scattering improves the agreement between the Migdal theory of the Landau-Pomeranchuk effect and experimental results.

Contribution

It introduces an improved screening angular parameter in the quasiclassical approximation, enhancing the accuracy of the LPM-effect theoretical predictions.

Findings

Better agreement with experimental data using quasiclassical approximation

Improved screening angular parameter enhances theoretical accuracy

Quasiclassical approach outperforms Born approximation in this context

Abstract

Using the improved value of the screening angular parameter in the quasiclassical approximation of the Moliere multiple scattering theory we show that the best agreement between the Migdal theory of the LPM-effect and experiment is achieved if the multiple scattering of electrons by target atoms is described using the quasiclassical approximation instead of the traditionally used Born one.