Translational kinetic energy release in dissociative electron attachment to C₂Cl₄, CCl₄ , CFCl₃, and 1,1,1‐C₂Cl₃F₃ Available to Purchase

Translational energy release in dissociative electron attachment to C₂Cl₄, CCl₄ , CFCl₃, and 1,1,1‐C₂Cl₃F₃ has been investigated at subthermal electron energies through studies of collisions involving K(nd) Rydberg atoms. For CCl₄ and CFCl₃ , the observed mean translational energy release is in good agreement with the predictions of quasiequilibrium theories of unimolecular decay, suggesting that the excess energy of reaction is well‐distributed among the internal modes of the intermediate negative ion prior to dissociation. In contrast, the data for 1,1,1‐C₂Cl₃F₃ indicate rapid dissociation before effective redistribution of the excess energy can occur. Implications of this as regards measurement of free‐electron attachment cross sections at very‐low energies are discussed.