We have measured the kinetic energy release (KER) distributions for electron-induced dissociation of mass-selected molecular parent and fragment ions of propane. They are compared with distributions determined for spontaneous (metastable) dissociation. The average KER for induced dissociation of C3H8+ into C3H7+ is 13.2 +/- 1.2 meV, about 42% larger than for the spontaneous reaction. This large difference is attributed to the dramatically reduced time at which the induced reaction can be sampled. In contrast, the KER for dissociation of C3H7+ into C3H5+, which is characterized by a large reverse activation energy, is hardly affected by the experimental time scale. (C) 2000 American Institute of Physics. [S0021-9606(00)00826-6].
Journal of Chemical Physics
AMERICAN INSTITUTE OF PHYSICS
Digital Object Identifier (DOI)
The following article appeared in J. Chem. Phys. 113, 616 (2000); doi: 10.1063/1.481837 and may be found at http://dx.doi.org/10.1063/1.481837.
© 2000 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.