Electron scattering in HCl: An improved nonlocal resonance model

• Published in: Physical review. A, Atomic, molecular, and optical physics Vol. 81; no. 4
• Main Authors: Fedor, J., Winstead, C., McKoy, V., Čížek, M., Houfek, K., Kolorenč, P., Horáček, J.
• Format: Journal Article
• Language: English
• Published: United States 05-04-2010
• Subjects: ANIONS; ATOMIC AND MOLECULAR PHYSICS; CHARGED PARTICLES; CHLORINE COMPOUNDS; COLLISIONS; CROSS SECTIONS; DIAGRAMS; ELASTIC SCATTERING; ELECTRON ATTACHMENT; ELECTRONS; ELEMENTARY PARTICLES; ENERGY; ENERGY-LEVEL TRANSITIONS; EXCITATION; FERMIONS; HALOGEN COMPOUNDS; HYDROCHLORIC ACID; HYDROGEN COMPOUNDS; INFORMATION; INORGANIC ACIDS; INORGANIC COMPOUNDS; IONS; LEPTONS; POTENTIAL ENERGY; RESONANCE; SCATTERING; TEMPERATURE DEPENDENCE
• ISSN: 1050-2947; 1094-1622
• DOI: 10.1103/PhysRevA.81.042702

We present an improved nonlocal resonance model for electron-HCl collisions. The short-range part of the model is fitted to ab initio electron-scattering eigenphase sums calculated using the Schwinger multichannel method, while the long-range part is based on the ab initio potential-energy curve of the bound anion HCl{sup -}. This model significantly improves the agreement of nonlocal resonance calculations with recent absolute experimental data on dissociative electron attachment cross sections for HCl and DCl. It also partly resolves an inconsistency in the temperature effect in dissociative electron attachment to HCl present in the literature. Finally, the present model reproduces all qualitative structures observed previously in elastic scattering and vibrational-excitation cross sections.