Radiation of Tenuous Air with Contaminants at Low Temperatures

  • M. Scheibe


In this chapter we deal with non-equilibrium radiation of air at low temperatures, i.e., primarily below 6000°K, and at low densities. We are considering systems smaller in dimension than the radiative mean free path and under such conditions a Boltzmann distribution among the excited electronic state populations at a definable temperature can only be maintained if collision excitation and de-excitation mechanisms are dominant and are in balance. If the density of the air is low enough, radiative processes will compete with the collision processes, and the excited state populations can deviate significantly from those predicted by LTE. This in turn will drastically affect the radiative properties of the air.


Vibrational State Vibrational Level Positive System Excitation Rate Electron Recombination 
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© Springer Science+Business Media New York 1969

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  • M. Scheibe

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