Energy Distribution in Products of Ion-Molecule Reactions

One of the important problems in reaction kinematics is the distribution of energy in the products of reaction. Several investigators have determined the translational energies of the products of certain ion-molecule reactions. Thus, Durup determined the translational energy of the product ion for reactions 

In order to achieve such a relation, it is first necessary to establish whether the reaction proceeds through a long-lived complex or a stripping or direct mechanism. It is well known that certain classes of reactions such as (44) proceed through long-lived complexes. The scrambling of isotope labels provides one criterion of complex formation. Thus, in the reaction 

Franklin and Haney determined the translational energy of the product ions in the laboratory system for several reactions as a function of electron voltage. The instrument employed was a time-of-flight mass spectrometer modified for operating at pressures up to about 50 jum and the method of measurement was that of Franklin et which has been shown 

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