Electronic excitation (5–9 eV) in ethylene and some haloethylenes by threshold electron-impact spectroscopy with an improved energy resolution

An improvement of a conventional trochoidal electron monochromator is presented. In trapped-electron spectra the fwhm is now reduced to 100 meV, even in the presence of reactive gases. Electron excitation and resonance processes have been studied in ethylene, fluoroethylene, 1,1-difluoroethylene and...

Full description

Saved in:
Bibliographic Details
Published in:Chemical physics 1980-01, Vol.52 (3), p.431-442
Main Authors: Verhaart, G.J., Brongersma, H.H.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:An improvement of a conventional trochoidal electron monochromator is presented. In trapped-electron spectra the fwhm is now reduced to 100 meV, even in the presence of reactive gases. Electron excitation and resonance processes have been studied in ethylene, fluoroethylene, 1,1-difluoroethylene and chlorotrifluoroethylene. Singlet and triplet levels of the first Rydberg state can be resolved in the threshold spectrum, due to resonance excitation and the improved energy resolution. Vibronic structure is reported in the transition to the 1B 1g state in ethylene. Some optically forbidden valence shell transitions have been discovered around 8.5 eV in 1,1-difluoroethylene and chlorotrifluoroethylene.
ISSN:0301-0104
DOI:10.1016/0301-0104(80)85245-1