The Iodine Molecule by Sergey Lukashov Alexander Petrov & Anatoly Pravilov

Author:Sergey Lukashov, Alexander Petrov & Anatoly Pravilov
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

V → T and T → V Processes

Probability (P) of V → T (vibrational relaxation ) and T → V (vibrational excitation) transition per a collision depends very strongly on the value of vibrational quantum. Therefore, it is very low (P 1,0 ~ 10−8) for N2 ground state molecules in N2(X,v X = 1) + N2(X,v X = 0) collisions (ω e = 2358 cm−1) and much higher for the Cl2(X,v X = 1) + Cl2(X,v X = 0) collisions (ω e = 557 cm−1) (P 1,0 ~ 2·10−5) (see e.g [1, 2] and references). Probabilities of the V↔T increase with a vibrational quantum number of the state, so it can be close to 1 near dissociation limit. The Δv – any propensity rule is valid for energy transfer from vibrational levels corresponding to low vibrational quanta. For very low vibrational quanta transitions with large Δv, ΔE v,v + 1 ≈ kT, become possible.

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