Injection of photoelectrons into dense argon gas

TL;DR

This paper investigates how photoelectrons are injected into dense argon gas at low temperature, revealing that multiple scattering effects are crucial for understanding electron transport in such environments.

Contribution

It demonstrates that the Young-Bradbury model explains electron injection in dense argon gas only when multiple scattering effects are included.

Findings

Experimental data aligns with the Young-Bradbury model with multiple scattering considerations.

Electron transport properties depend significantly on gas density and electric field.

Multiple scattering effects are essential for accurate modeling of electron injection.

Abstract

The injection of photoelectrons in a gaseous or liquid sample is a widespread technique to produce a cold plasma in a weakly--ionized system in order to study the transport properties of electrons in a dense gas or liquid. We report here the experimental results of photoelectron injection into dense argon gas at the temperatureT=142.6 K as a function of the externally applied electric field and gas density. We show that the experimental data can be interpreted in terms of the so called Young-Bradbury model only if multiple scattering effects due to the dense environment are taken into account when computing the scattering properties and the energetics of the electrons.