Related Experiment Video
Updated: May 12, 2026
08:51
Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers
Published on: August 18, 2017
Spatial correlations in finite samples revealed by Coulomb explosion.
Ulf Saalmann1, Alexey Mikaberidze, Jan M Rost
1Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Straße 38, 01187 Dresden, Germany.
Physical Review Letters
|April 16, 2013
Summary
Fast electron removal reveals atomic correlations in samples via a kinetic energy peak. This finding, explained analytically, can be observed using advanced light sources.
Area of Science:
- Atomic physics
- Quantum mechanics
- Materials science
Background:
- Understanding atomic correlations is crucial for materials science.
- Previous models often relied on mean-field approximations.
- Investigating electron-ion dynamics requires advanced experimental techniques.
Purpose of the Study:
- To demonstrate a method for uncovering initial atomic correlations.
- To analyze the role of system boundaries in particle dynamics.
- To provide an analytical description of observed phenomena.
Main Methods:
- Simulating the fast removal of multiple electrons from a finite atomic sample.
- Analyzing the kinetic-energy spectrum of resulting ions.
- Developing an analytical model to describe peak formation.
Main Results:
- A pronounced peak in the kinetic-energy spectrum indicates atomic correlations.
- The peak formation is influenced by the discrete particle nature and boundary of the sample.
- An analytical model successfully describes the peak, going beyond mean-field theory.
Conclusions:
- Fast electron removal is an effective probe for initial atomic correlations.
- The interplay between system composition and boundary effects is significant.
- Experimental verification is feasible with 4th-generation light sources.
Related Concept Videos
01:30Coulomb's Law
Experiments with electric charges have shown that if two objects each have an electric charge, they exert an electric force on each other. The magnitude of the force is linearly proportional to the net charge on each object and inversely proportional to the square of the distance between them. The direction of the force vector is along the imaginary line joining the two objects and is dictated by the signs of the charges involved.
Newton's third law applies to the Coulomb force — the force on...
Newton's third law applies to the Coulomb force — the force on...
01:15Coulomb's Law and The Principle of Superposition
Coulomb's Law describes the force experienced by two point charges under each other's presence. But what if there are more than two charges? For example, if there is a third charge, does it experience a force that is a simple combination of the individual forces due to the first two charges? Can it be described mathematically?
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 the...
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 the...
01:23Correlation of Experimental Data
Dimensional analysis simplifies complex physical problems and guides experimental investigations, but it does not provide complete solutions. It identifies the dimensionless groups that influence a phenomenon, but experimental data is needed to establish the specific relationships and validate theoretical predictions.
For example, a spherical particle moving through a viscous fluid experiences drag. Dimensional analysis shows that the drag force depends on the particle's diameter, velocity, and...
For example, a spherical particle moving through a viscous fluid experiences drag. Dimensional analysis shows that the drag force depends on the particle's diameter, velocity, and...
01:14Atomic Nuclei: Nuclear Spin State Population Distribution
Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
02:54Trends in Lattice Energy: Ion Size and Charge
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
01:21Energy Associated With a Charge Distribution
The work done to bring a charge through a distance r is given by the potential difference between the initial and the final position. To assemble a collection of point charges, the total work done can be expressed in terms of the product of each pair of charges divided by their separation distance, defined with respect to a suitable origin. Solving this expression gives the energy stored in a point charge distribution.