Differential and Integral Cross Sections for the Electron Impact Excitation of the 2 singlet Delta(g) and b singlet Sigma(g)(+) States of O2.
Abstract
Electron impact energy-loss spectra of O2 have been analyzed for incident electron energies from 4 eV to 45 eV, scattering angles from 10 to 90 degrees, and for energy loss from 0 to 5 eV. The inelastic processes observed were the excitation of the a singlet Delta(g) and b singlet Sigma(g)(+) electronic states and vibrational excitation in some cases to v'' = 13. The excitation cross sections at each energy were made absolute by normalizing the sum of the integral cross sections (all inelastic, ionization and elastic) to measured electron-O2 total cross sections. The differential cross sections for the a singlet Delta(g) and b singlet Sigma(g)(+) states show nearly isotropic behavior as expected for optically spin-forbidden transitions. The elastic differential cross sections are strongly forward peaked at higher energies but become only slightly forward peaked at the lower energies. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1971
- Accession Number
- AD0729185
Entities
People
- David C. Cartwright
- Sandor Trajmar
- Walter Williams
Organizations
- The Aerospace Corporation