Related Experiment Video
Updated: Jul 19, 2026

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
Published on: July 27, 2018
Low-energy nondipole effects in molecular nitrogen valence-shell photoionization
O Hemmers1, R Guillemin, D Rolles
1Department of Chemistry, University of Nevada, Las Vegas, Nevada 89154-4003, USA.
Abstract:
Observations are reported for the first time of significant nondipole effects in the photoionization of the outer-valence orbitals of diatomic molecules. Measured nondipole angular-distribution parameters for the 3sigma(g), 1pi(u), and 2sigma(u) shells of N2 exhibit spectral variations with incident photon energies from thresholds to approximately 200 eV which are attributed via concomitant calculations to particular final-state symmetry waves arising from (E1)multiply sign in circle(M1,E2) radiation-matter interactions first-order in photon momentum. Comparisons with previously reported K-edge studies in N2 verify linear scaling with photon momentum, accounting in part for the significantly enhanced nondipole behavior observed in inner-shell ionization at correspondingly higher momentum values in this molecule.
More Related Videos
08:54Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
Published on: January 25, 2020
08:22Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
Published on: August 6, 2018
Related Concept Videos
Molecular Orbital Theory II
VSEPR Theory and the Effect of Lone Pairs
Polar Covalent Bonds
UV–Vis Spectroscopy: Molecular Electronic Transitions
Van der Waals Interactions
π Electron Effects on Chemical Shift: Overview