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Vibrational relaxation and collision‐induced dissociation of xenon fluoride by neon
Author(s) -
Wilkins Roger L.
Publication year - 1989
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550211102
Subject(s) - neon , chemistry , dissociation (chemistry) , vibrational energy relaxation , atomic physics , bond dissociation energy , xenon , excited state , ground state , argon , physics , organic chemistry
Rate coefficients were calculated for vibrational relaxation and collision‐induced dissociation of ground state xenon fluoride in neon at temperatures between 300 and 1000 K for each of nine vibrational levels. These coefficients were calculated using a pairwise additive potential energy surface, which consists of a Morse function for the XeF interaction and Lennard–Jones functions for the NeXe and NeF interactions. Rate coefficients are provided for both temperature and v ‐ dependences. The vibrational relaxation and dissociation processes occur by multiquanta transitions. Dissociation can take place from all v ‐levels provided that the internal energy of the XeF molecule is close to the rotationless dissociation limit. The order of increase effectiveness of the various forms of energy in promoting dissociation in XeF was found to be translation–rotation‐vibration. At room temperature, neon atoms were found to be more efficient than helium atoms in the dissociation processes; helium atoms were found to be more efficient than neon atoms in the vibrational relaxation of XeF. Strong vibration–rotation coupling in both vibrational relaxation and in the dissociation processes is demonstrated.