Related Experiment Video
Updated: Jan 4, 2026
06:53
Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
Published on: July 27, 2018
9.1K
Fano's Propensity Rule in Angle-Resolved Attosecond Pump-Probe Photoionization
David Busto1, Jimmy Vinbladh2, Shiyang Zhong1
1Department of Physics, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden.
Physical Review Letters
|November 8, 2019
Summary
We generalized Fano
Area of Science:
- Quantum mechanics
- Atomic physics
- Laser physics
Background:
- Fano's propensity rule describes light absorption with increasing angular momentum.
- Laser-assisted photoionization involves multiple photon absorptions.
- Attosecond photoelectron interferometry probes ultrafast electron dynamics.
Purpose of the Study:
- Generalize Fano's propensity rule to laser-assisted photoionization.
- Explain quantum interference in attosecond photoelectron interferometry.
- Investigate angular and delay dependence of photoionization time.
Main Methods:
- Theoretical generalization of Fano's propensity rule.
- Analysis of laser-assisted photoionization processes.
- Comparison with experimental attosecond photoelectron interferometry data.
Main Results:
- Predicted asymmetry between photon absorption and emission.
- Incomplete quantum interference observed in attosecond photoelectron interferometry.
- Explanation of angular dependence of photoionization time delays.
- Explanation of delay dependence of photoelectron angular distributions.
Conclusions:
- The generalized propensity rule accurately describes laser-assisted photoionization.
- Asymmetry in photon processes impacts quantum interference.
- Theory validated by experimental results in Argon (Ar).
More Related Videos
Related Concept Videos
01:29UV–Vis Spectroscopy: Woodward–Fieser Rules
28.0K
UV–Visible absorption spectra of conjugated dienes arise from the lowest energy π → π* transitions. The light-absorbing part of the molecule is called the chromophore, and the substituents directly attached to the chromophore are called auxochromes. A strong correlation exists between the absorption maxima, λmax, and the structure of a conjugated π system. The Woodward–Fieser rules predict the value of λmax for a given structure by adding the...
28.0K
01:19Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle
1.5K
Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
1.5K
01:10Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule
2.3K
In the AX proton spin system, proton A can sense the two spin states of a coupled proton X, resulting in a doublet NMR signal with two peaks of equal (1:1) intensity. When proton A is coupled to two equivalent protons (AX2 spin system), the spin states of each X can be aligned with or against the external field, creating three possible scenarios. This results in a 1:2:1 triplet signal, where the central peak corresponds to the chemical shift of A and is twice as large or intense as the...
2.3K
01:16IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration
2.7K
A covalently bonded heteronuclear diatomic molecule can be modeled as two vibrating masses connected by a spring. The vibrational frequency of the bond can be expressed using an equation derived from Hooke's law, which describes how the force applied to stretch or compress a spring is proportional to the displacement of the spring. In this case, the atoms behave like masses, and the bond acts like a spring.
According to Hooke's law, the vibrational frequency is directly proportional to...
According to Hooke's law, the vibrational frequency is directly proportional to...
2.7K
01:23Atomic Spectroscopy: Absorption, Emission, and Fluorescence
2.4K
Atomic spectroscopy is a vital tool in elemental analysis, both qualitatively and quantitatively. It can be broadly divided into optical spectroscopy, mass spectroscopy, and X-ray spectroscopy methods. The optical spectroscopic methods are atomic absorption spectroscopy (AAS), atomic emission spectroscopy (AES), and atomic fluorescence spectroscopy (AFS). The first step in all three methods is atomization, where the solid, liquid, or solution-phase samples are converted into gas-phase atoms and...
2.4K
01:25Atomic Absorption Spectroscopy: Atomization Methods
1.3K
Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the...
1.3K