Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Chemical Ionization (CI) Mass Spectrometry01:21

Chemical Ionization (CI) Mass Spectrometry

831
The molecular ion peak of a molecule in the mass spectrum provides vital information for molecular identification. However, conventional electron impact ionization can lead to the rapid dissociation of some molecular ions before they reach the detector. A milder ionization method is required to increase the lifetime of such ionized analyte molecules. Chemical ionization (CI) is a gas-phase protonation reaction useful for mass-analyzing analyte molecules that are easily protonated to yield the...
831
Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

687
The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
687
Molecular Orbital Theory I02:35

Molecular Orbital Theory I

32.6K
Overview of Molecular Orbital Theory
32.6K
Mass Spectrometry: Overview01:19

Mass Spectrometry: Overview

5.6K
Mass spectrometry is an analytical technique used to determine the molecular mass and molecular formula of a compound. The basic principle of mass spectrometry is to generate ions from the analyte molecule and measure these ion abundances against their molecular mass.  One common type of ionization, known as electrospray ionization or EI, bombards the analyte molecules in the gas phase with high-energy electron beams. The electron beams displace an electron from the molecule and leave...
5.6K
Mass Spectrometry: Molecular Fragmentation Overview01:20

Mass Spectrometry: Molecular Fragmentation Overview

3.5K
The ionization of a molecule into a molecular ion inside the mass spectrometer causes instability in the molecule's structure due to the loss of an electron. This eventually leads to the fragmentation or breaking of some bonds in the molecule. The fragmentation occurs predominantly at specific bonds to yield relatively stable fragments.
One type of fragmentation pattern is the cleavage of a single bond in the molecular ion. The cleavage leads to a radical and a cation. The cleavage can...
3.5K
Mass Spectrometers01:16

Mass Spectrometers

5.9K
This lesson details the instrumentation of a mass spectrometer—a physical instrument to perform mass spectrometry on analyte molecules and record the characteristic mass spectra. This is achieved via three chief functions:
5.9K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Pathfinder experiments with atom interferometry in the Cold Atom Lab onboard the International Space Station.

Nature communications·2024
Same author

Electro-Nuclear Dynamics of Single and Double Ionization of H<sub>2</sub> in Ultrafast Intense Laser Pulses.

The journal of physical chemistry. A·2024
Same author

Quantum gas mixtures and dual-species atom interferometry in space.

Nature·2023
Same author

A space-based quantum gas laboratory at picokelvin energy scales.

Nature communications·2022
Same journal

Revisiting crossed-correlated baths in open quantum systems simulated by HEOM or T-TEDOPA.

The Journal of chemical physics·2026
Same journal

Vesicle size and membrane composition control monomer transfer pathways in multicomponent lipid vesicles.

The Journal of chemical physics·2026
Same journal

Polaron-mediated exciton dynamics of P(NDI2OD-T2) unveiled by transient absorption spectroscopy under electrochemical conditions.

The Journal of chemical physics·2026
Same journal

Green-Kubo relation in a mesoscale odd fluid model.

The Journal of chemical physics·2026
Same journal

Nitrogenation of microscopic MoS2 surfaces by oxidation scanning probe lithography.

The Journal of chemical physics·2026
Same journal

Molecular structure, binding, and disorder in TDBC-Ag plexcitonic assemblies.

The Journal of chemical physics·2026
See all related articles

Related Experiment Video

Updated: Aug 26, 2025

Spatial Separation of Molecular Conformers and Clusters
10:37

Spatial Separation of Molecular Conformers and Clusters

Published on: January 9, 2014

9.1K

Strong-field molecular ionization beyond the single active electron approximation.

J-N Vigneau1, T-T Nguyen-Dang2, E Charron1

  • 1Institut des Sciences Moléculaires d'Orsay, Université Paris-Saclay, CNRS, 91405 Orsay, France.

The Journal of Chemical Physics
|October 8, 2022
PubMed
Summary
This summary is machine-generated.

This study reveals limits of the single-active electron approximation in strong-field ionization. We observed non-monotonous ionization in H2 molecules, showing enhanced ionization and quenching due to overlapping resonances.

More Related Videos

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
08:22

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

Published on: August 6, 2018

7.0K
Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F&#8722;
06:53

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

Published on: July 27, 2018

8.8K

Related Experiment Videos

Last Updated: Aug 26, 2025

Spatial Separation of Molecular Conformers and Clusters
10:37

Spatial Separation of Molecular Conformers and Clusters

Published on: January 9, 2014

9.1K
Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
08:22

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

Published on: August 6, 2018

7.0K
Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F&#8722;
06:53

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

Published on: July 27, 2018

8.8K

Area of Science:

  • Quantum mechanics
  • Atomic and molecular physics
  • Strong-field physics

Background:

  • The single-active electron approximation simplifies complex quantum systems, particularly in strong-field ionization.
  • Understanding electron-electron interactions is crucial for accurate modeling of molecular ionization dynamics.

Purpose of the Study:

  • To investigate the quantitative limits of the single-active electron approximation for strong-field ionization.
  • To explore the role of electron-electron interactions in the dynamics of H2 single ionization.

Main Methods:

  • Time-dependent configuration interaction method to solve the time-dependent Schrödinger equation.
  • Adiabatic tuning of electron-electron interaction strength.
  • Simulation of H2 ionization using a vibrationally frozen model under intense laser fields.

Main Results:

  • Observed non-monotonous ionization probability profiles for H2 at intermediate internuclear distances.
  • Identified instances of enhanced ionization and partial ionization quenching.
  • Correlated these phenomena with resonance-enhanced multiphoton ionization mechanisms.

Conclusions:

  • The single-active electron approximation has limitations in describing strong-field ionization phenomena in molecules like H2.
  • Electron-electron interactions significantly influence ionization dynamics, leading to complex behaviors.
  • Interfering overlapping resonances play a key role in the observed ionization patterns.