Differential cross section for dissociative attachment in HCl: Cl-and H-formation
- 14 May 1980
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 13 (9) , 1909-1918
- https://doi.org/10.1088/0022-3700/13/9/020
Abstract
A modified electron impact spectrometer is used to study Cl- and H- formation in HCl by dissociative attachment. It is shown that the Cl- ion yield exhibits a small, new structure located at the maximum of the main peak in addition to the well known structure on the high-energy tail at the vibrational levels of HCl. The H- ion yield exhibits two peaks at 7.1 and 9.3 eV. The first one is structureless with a non-vertical onset and the angular distribution of the H- is characteristic of a d sigma wave. These results indicate that H- formation in the energy range of this peak proceeds via a repulsive 2 Sigma + HCl- state. The second peak, which proceeds via a 2 Pi HCl- state, exhibits a structure on the high-energy tail and the angular distribution of the H- ions is characteristic of a d pi wave. The structures in this peak are attributed to the interaction of the 2 Pi state of HCl- with the series of Feshbach resonances associated with Rydberg states of HCl.Keywords
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