Temperature Dependence in Rainbow Scattering of Hyperthermal Ar Atoms from LiF(001)

TL;DR

This paper presents a semiclassical theory explaining how temperature affects rainbow scattering patterns of hyperthermal argon atoms colliding with LiF(001), aligning with recent experimental observations.

Contribution

The authors develop a semiclassical model incorporating multiphonon energy transfers to explain temperature-dependent scattering features.

Findings

The model successfully reproduces experimental temperature dependence.

Multiphonon processes are crucial for understanding scattering behavior.

The theory provides insights into atom-surface collision dynamics.

Abstract

Recent experiments have reported measurements of rainbow scattering features in the angular distributions of hyperthermal Ar colliding with LiF(001) [Kondo et al., J. Chem. Phys. 122, 244713 (2005)]. A semiclassical theory of atom-surface collisions recently developed by the authors that includes multiphonon energy transfers is used to explain the temperature dependence of the measured scattered angular distribution spectra.