Swarm Studies and Inelastic Electron-Molecule Collisions : Proceedings of the Meeting of the Fourth International Swarm Seminar and the Inelastic Electron-Molecule Collisions Symposium, July 19–23, 1985, Tahoe City, California, USA

This volume presents the contributions of participants in the Symposium on Swarm Studies and Inelastic Electron-Molecule Collisions, held on July 19-23, 1985, in Tahoe City, California. This was a joint meeting of the Fourth International Swarm Seminar and the Electron-Molecule Collisions Symposium which have been traditionally separate satellite symposia to the International Conference on the Physics of Electronic and Atomic Collisions (ICPEAC). In the early stages of planning for these two satellite symposia to the XIVth ICPEAC, a group of us recognized the significant scientific merit and advantages of having a joint symposium. This idea was particularly appealing due to a large mutual interest in important advances (theoretical, experimental, and modeling) in both fields, and because it provides a forum to bring together a single-collision point of view with a multiple-collision one. For example, studies of multiple-term solutions to Boltzmann's equation and their application to swarm systems are intrinsically coupled to the availability of both integral and differential cross-sections for electron-molecule collisions. In tum, experimental and theoretical studies of these electron-molecule scattering cross-sections are becoming quite sophisticated, accurate, and comprehensive. Furthermore, in swarm studies, computational and experimental methods have advanced to the point where detailed and meaningful comparison with, and use of, single-collision beam data is now possible. More­ over, recent experimental advances in the study of single-collision electron at­ tachment phenomena have provided a significant overlap with swarm data and extension to subthermal energies. Front Matter....Pages i-xiii Front Matter....Pages 1-1 A comparative Study of the Computing Methods Actually in use for Accurate Determination of Swarm Parameters....Pages 3-22 Recent Advances in High-Pressure Swarms....Pages 23-41 Electron—Ion Recombination in High-Pressure Gases....Pages 43-52 Front Matter....Pages 53-53 Principles of the Measurement of Electron Drift Velocities....Pages 55-61 Effect of Boundaries and Field Inhomogeneities on Swarms....Pages 63-72 Front Matter....Pages 73-73 Program of the JILA Atomic Collisions Cross-Section Data Center....Pages 75-75 Collisionally Induced Dissociation of Ions in a Strong Drift Field and its use as an Analysis Tool....Pages 77-77 Retarding Potential Difference Analysis of Ion Swarm Velocity Distributions: A Computer Simulation Study....Pages 79-79 Transverse Diffusion of Lithium Ions in Helium....Pages 81-81 Electron Attachment to F 2 ....Pages 83-84 Thermal Electron Attachment to van der Waals Molecules (O 2 .N 2 )....Pages 85-85 Time-Resolved Measurements of Thermalization Processes of Subexcitation Electrons in Rare Gases....Pages 87-87 Electron Swarm Study in Nitrogen-Rare-Gas Mixtures and Vibrational Excitation in Nitrogen....Pages 89-89 Excited-State Quenching Phenomena in Weakly Ionized Nitrogen....Pages 91-91 Electron Drift Velocity and Attachment and Ionization Coefficients in CH 4 , CF 4 , C 2 F 6 , C 3 F 8 and n-C 4 F 10 ....Pages 93-94 Comparison of Calculated and Experimental Thermal Attachment Rate Constants for SF 6 in the Temperature Range 200–600K....Pages 95-96 Measurements of Electron and Ion Transport Data in SF 6 and SF 6 /N 2 Mixtures....Pages 97-97 Common Parameterizations of Swarm and Breakdown Data for Binary Electronegative-Nonelectronegative Gas Mixtures....Pages 99-99 Boltzmann Equation Analysis of the Synergism of Uniform Field Breakdown Voltage for SF 6 -CCL 2 F 2 and SF 6 -SO 2 Mixtures....Pages 101-101 Effect of Gas Impurity for the Electron Drift Velocities in Inert Gases by Boltzmann Equation Analysis....Pages 103-103 Front Matter....Pages 73-73 Spatial Variations in the Energy Distribution Function for Steady State Townsend Discharges....Pages 105-105 Excitation and Ionization Rates in Hydrogen at Very High E/n....Pages 107-107 Evolution Equation and Transport Coefficients of Swarms in Short Time Development of Initial Relaxation Processes....Pages 109-110 Transient Hot Electron Mobility in Ethene and Cyclopropane....Pages 111-111 Nonequilibrium Behavior of Electrons in Strong Electric Fields....Pages 113-113 Steady-State, Spatially Dependent Electron Transport and Rate Coefficients....Pages 115-115 Transport Coefficients of Electron Swarms in Gases in the Presence of Nonconservative Collisions....Pages 117-117 Convenient Expressions of Diffusion Coefficients for Free Electrons in Gases in Presence of Ramsauer Effects....Pages 119-119 The Approach to Equilibrium of Electron Swarms in Non-Planar Geometries....Pages 121-121 Magnetic Control of Low Pressure Diffuse Discharges....Pages 123-123 Front Matter....Pages 125-125 Relations Between Electron-Molecule Scattering and Swarm Experiments and Analysis....Pages 127-141 Experimental and Theoretical Investigation of Near-Threshold e-H 2 Collisions....Pages 143-166 Electron Collision Cross-Sections for Molecules Determined from Beam and Swarm Data....Pages 167-187 Front Matter....Pages 189-189 Low-Energy, High-Resolution Electron-Molecule Collision Studies....Pages 191-204 Threshold Phenomena in Electron-Molecule Collisions....Pages 205-216 Rotational and Vibrational Excitation of Molecules by Low-Energy Electrons....Pages 217-237 Studies of Elastic and Electronically Inelastic Electron-Molecule Collisions....Pages 239-264 Inelastic Electron-Molecule Scattering Using the R-Matrix Method....Pages 265-283 Front Matter....Pages 285-285 Fragmentation Dynamics and Energy Partitioning in Dissociative Attachment on Triatomic Molecules....Pages 287-302 Effects of Temperature on Dissociative and Nondissociative Electron Attachment....Pages 303-328 Front Matter....Pages 285-285 Electron Impact Ionization Cross-Sections for Atoms, Radicals, and Metastables....Pages 329-346 Total Dissociation Cross-Sections of Fluoroalkanes for Electron Impact: Their Usefulness for Understanding Plasma-Assisted Etching Environments....Pages 347-350 Electron-Cluster Interactions....Pages 351-366 Front Matter....Pages 367-367 Discharge Modeling....Pages 369-384 Boltzmann Equation in Vibrationally and Electronically Excited Molecular Plasmas....Pages 385-400 Applications of Cross-Sections for Electron-Molecule Collision Processes....Pages 401-408 Current Applications and Opportunities in Swarm Studies....Pages 409-423 Satellite Meetings of the XIVth ICPEAC; July 19 - 23, 1985; Tahoe City, California, USA