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The vibrational relaxation of oxygen by O 2 -O collision is studied using physical kinetics and molecular collision dynamics in the temperature range from 2,000 K to 7,000 K. This study shows that all the potential energy surfaces appearing in the collision must be taken into account to correctly calculate the rate constant, and that the Bethe-Teller theory is inadequate to describe vibrational relaxation in a strong non-equilibrium state. This study also validates existing experimental models widely used to describe vibrational relaxation.

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: Vibrational relaxation of oxygen by O 2 -O collision is studied in the temperature range 2000-7000 K with physical kinetics and molecular collision dynamics. This study shows that all the potential energy surfaces appearing in the collision must be considered to correctly calculate rate constants, and that the Bethe-Teller theory is inadequate to describe vibrational relaxation in strong non-equilibrium, and validates widely used experimental models for vibrational relaxation.

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