ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.456058
