Related Experiment Video
Updated: Feb 18, 2026

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
A quantum mechanical exploration of phonon energy-loss spectroscopy using electrons in the aloof beam geometry
L J Allen1,2, H G Brown3, S D Findlay3
1School of Physics, University of Melbourne, Parkville, Victoria 3010, Australia.
Abstract:
Phonon energy-loss spectroscopy using electrons has both high resolution and low resolution components, associated with short- and long-range interactions, respectively. In this paper, we discuss how these two contributions arise from a fundamental quantum mechanical perspective. Starting from a correlated model for the atomic motion we show how short range 'impact' scattering and long range 'dipole' scattering arises. The latter dominates in aloof beam imaging, an imaging geometry in which radiation damage can be avoided.
Related Concept Videos
The de Broglie Wavelength
The Quantum-Mechanical Model of an Atom
The Bohr Model
Molecular Spectroscopy: Absorption and Emission
Atomic Spectroscopy: Absorption, Emission, and Fluorescence
π Electron Effects on Chemical Shift: Overview

