Marrone-Treanor model

Marrone-Treanor Model (Marrone Treanor, 1963). This model assumes an exponential distribution (with parameter U) of probabihties of dissociation from different vibrational levels. If t/ c , the probabilities of dissociation from all vibrational levels are equal. The non-equilibrium dissociation factor Z can be found within the framework of the model... 

The negative temperature -U is a fitting parameter of the model with recommended values U = 0.6 77 - 3 77. The Macheret-Fridman model permits us to find theoretically the Marrone-Treanor parameter... 

The rate coefficients for dissociation from different vibrational levels have been studied much less widely than for vibrational energy transitions. Two models are commonly used for calculations the ladder-climbing model assuming dissociation only from the last vibrational level (see, for instance, Armenise et al. (1996 1995) Capitelli et al. (1997) Osiprov (1966)), and that of Treanor and Marrone Marrone Treanor (1963) allowing for dissociation from any vibrational state. 

In Ref. Esposito, Capitelli, Kustova Nagnibeda (2000), the dissociation rate coefficients diss calculated within the framework of the Treanor-Marrone model are compared with those obtained from trajectory calculations Esposito, Capitelli Gorse (2000), some recommendations for the optimum choice for the parameter U for the specific reactions are given. Eigure 1 presents the temperature dependence of the state-dependent dissociation rate coefficients in an (N2, N) mixture. The coefficients are calculated for different... 

Esposito, R, Capitelli, M., Kustova, E. Nagnibeda, E. (2000). Rate coefficients for the reaction N2(i)+N=3N a comparison of trajectory calculations and the Treanor-Marrone model., Chem. Phys. Lett. 330 207-211. 

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