Related Experiment Video
Updated: May 9, 2026

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
Published on: July 27, 2018
Absolute cross sections for O2 dication production by electron impact
L Sigaud1, Natalia Ferreira, E C Montenegro
1Instituto de Física, Universidade Federal do Rio de Janeiro, P.O. 68528, 21941-972 Rio de Janeiro, RJ, Brazil.
Abstract:
Direct detection of homonuclear diatomic dications using mass spectrometry has the intrinsic inability to distinguish between fragments with the same mass-to-charge ratio, as is the case of the oxygen molecule. In this work, absolute cross sections for the double ionization of the homoisotopic (16)O2 molecule by electron impact, in the 30-400 eV energy range, is reported for the first time, and show significant discrepancies with previous results, obtained with the heteroisotopic (16)O(17)O. The measurements suggest that O2 (++) is mainly produced through post-collisional Auger-like deexcitation.
More Related Videos
09:40Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown
Published on: February 14, 2014
07:103D Depth Profile Reconstruction of Segregated Impurities Using Secondary Ion Mass Spectrometry
Published on: April 29, 2020
Related Concept Videos
Atomic Absorption Spectroscopy: Atomization Methods
π Electron Effects on Chemical Shift: Overview
Atomic Absorption Spectroscopy: Radiation and Light Sources
Two common narrow-range 'line' sources used in AAS are hollow-cathode lamps (HCLs) and...
Atomic Emission Spectroscopy: Overview
Atomic Emission Spectroscopy: Instrumentation
Atomic Emission Spectroscopy: Lab