Related Experiment Video
Updated: Jun 8, 2026

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
Two-photon excitation and relaxation of the 3d-4d resonance in atomic Kr
M Meyer1, D Cubaynes, V Richardson
1LIXAM, UMR 8624, CNRS-Université Paris Sud, Bâtiment 350, F-91405 Orsay Cedex, France.
Abstract:
Two-photon excitation of a single-photon forbidden Auger resonance has been observed and investigated using the intense extreme ultraviolet radiation from the free electron laser in Hamburg. At the wavelength 26.9 nm (46 eV) two photons promoted a 3d core electron to the outer 4d shell. The subsequent Auger decay, as well as several nonlinear above threshold ionization processes, were studied by electron spectroscopy. The experimental data are in excellent agreement with theoretical predictions and analysis of the underlying multiphoton processes.
Related Concept Videos
Atomic Nuclei: Types of Nuclear Relaxation
In spin–lattice or longitudinal relaxation, the excited spins exchange energy with the surrounding lattice as they return to the lower energy level. Among several mechanisms that contribute to spin–lattice relaxation, magnetic dipolar interactions are significant. Here, the excited nucleus transfers energy to a nearby...
Atomic Nuclei: Nuclear Relaxation Processes
Atomic Nuclei: Magnetic Resonance
Double Resonance Techniques: Overview
Spin decoupling is usually achieved by...
Deactivation Processes: Jablonski Diagram
Atomic Spectroscopy: Absorption, Emission, and Fluorescence

