Arc Study of the Oxygen Schumann-Runge System
Abstract
Other investigations have shown that the Schumann-Runge system of oxygen is excited by an inverse predissociation mechanism, O + O yield O2*. Under the condition where this excitation mechanism dominates, there is some question as to whether the radiation yielded a true rotational/vibrational electronic band spectrum, as opposed to a recombination continuum. Furthermore, there is a controversy as to whether the spectral intensity is that given by equilibrium theory. The present work utilized a 1 atm arc jet facility to heat air and O2-noble gas mixtures to temperatures between 3000 and 3500K. Both photographic and photoelectric spectra were recorded. In the latter case, wavelength scans from 2000 to 6000 A were carried out with 5 A resolution to obtain absolute intensity data. The spectra were found to have true rotational/vibrational electronic band structure, and were identified as the O2 Schumann- Runge system. Comparison with an equilibrium radiation model showed excellent agreement. A slight adjustment was made in the electronic transition moment for the NO(beta) system as demanded by the air runs.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1970
- Accession Number
- AD0717161
Entities
People
- Kurt L. Wray
- Stephen Fried