Related Experiment Video
Updated: Apr 23, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Observation of coherence in the time-reversed relativistic photoelectric effect
S Tashenov1, D Banaś2, H Beyer3
1Physikalisches Institut der Universität Heidelberg, 69120 Heidelberg, Germany.
Abstract:
The photoelectric effect has been studied in the regime of hard x rays and strong Coulomb fields via its time-reversed process of radiative recombination (RR). In the experiment, the relativistic electrons recombined into the 2p_{3/2} excited state of hydrogenlike uranium ions, and both the RR x rays and the subsequently emitted characteristic x rays were detected in coincidence. This allowed us to observe the coherence between the magnetic substates in a highly charged ion and to identify the contribution of the spin-orbit interaction to the RR process.
Related Concept Videos
Photoelectric Effect
The de Broglie Wavelength
Coulomb's Law and The Principle of Superposition
The Principle of Superposition answers the question. Yes, Coulomb's Law applies to each pair of charges, and the net force on each charge is the vector sum of...
Interaction of EM Radiation with Matter: Spectroscopy
The Wave Nature of Light
Atomic Nuclei: Larmor Precession Frequency

