Ebook: (e, 2e) & Related Processes

An (e,2e) experiment is the measurement of an electron impact ionization process where both the exiting electrons are detected in coincidence. Such measurements are almost at the limit of what can be known, in quantum mechanical terms, and its description presents a substantial theoretical challenge. There are at least two very good reasons for studying (e,2e) and related processes. In the first place we are now only beginning to understand the dynamics of the collision process. The range and sophistication of present experiments allow us to identify kinematic regimes where delicate and subtle effects can be observed, stretching current theories to their limit. Secondly, the multiple coincident technique offers us the possibility of an analytical tool that could be used to probe the structure of the target, be it atom, molecule, thin film or surface. Measurements are now being performed at threshold on H, on the inner shell levels of Au and Ag using projectiles at relativistic energies, with spin-polarized electrons on Li, on a myriad of molecules in symmetric, noncoplanar kinematics, and on He in a multitude of different geometries. The technique has recently been extended to excitation ionization (e,3e) and (gamma,2e) experiments. Major theoretical advances have also been made, but much still remains to be done.
This volume contains the invited papers that were presented at the Workshop on (e,2e) and related processes which took place in September/October 1992 in Cambridge, UK. The three major review papers which it contains together form an excellent introduction to this new and rapidly expanding area of physics and set the scene for the wide range of research contributions, both experimental and theoretical, from the leading scientists in the field.

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Content:
Front Matter....Pages i-ix
(e,2e), effective charges, distorted waves and all that!....Pages 1-32
Directions in (e,2e) and Related Processes....Pages 33-74
Near Threshold (e,2e) Ionisation of Helium and Atomic Hydrogen....Pages 75-81
Does Asymmetric (e,2e) Approach the Dipolar Limit at Intermediate Energies?....Pages 83-90
Knockout Reactions to Study Atomic and Molecular Electronic Structure: The Future....Pages 91-99
Absolute Experimental Cross Sections for Symmetric Coplanar (e,2e) Collisions of 45 to 500 eV Electrons With Helium....Pages 101-118
Recoil Ion Momentum Spectroscopy: A Complementary Technique to (e,2e) and (e,3e)....Pages 119-129
Arbitrary charged particle-impact ionisation of H and He: Scaling properties of cross sections....Pages 131-144
Electron Impact Ionisation-Excitation of Helium: Calculations Using Coupled Channel Parametric Potential Wavefunctions....Pages 145-164
Democratic Parameters for (e,2e) and (e,3e) Kinematics....Pages 165-170
Asymptotically Exact Distorted Wave Calculations....Pages 171-184
New Experiments Needed in (e,2e)....Pages 185-199
New Trends: Electron impact ionisation of laser excited atoms, and double ionisation by electron and photon impact....Pages 201-210
Laser-Assisted (e,2e) Collisions....Pages 211-222
(e,2e) Calculations Using a Correlated Final State....Pages 223-235
Solid state perspective in the theory of the Auger decay....Pages 237-258
High-Performance Computers in (e,2e) and (e,3e) Interactions with Atoms....Pages 259-264
Energy Loss and (e,2e) Studies of Molecules on Surfaces....Pages 265-272
Influence of Coulomb Forces on the Angular Momenta of Products in Three or More Fragmentary Reactions....Pages 273-280
Multiconfiguration Hartree-Fock Calculation of the Autoionization Resonance Parameters in the (e,2e) Reaction on Helium Atom....Pages 281-295
Near Threshold (?,2e) Experiments in the Perpendicular Plane....Pages 297-306
Multicoincidence Investigation of Ionization Dynamics....Pages 307-326
Coupling the Coplanar (e,2e) Geometry to the Perpendicular Plane Geometry....Pages 327-339
Double Ionization of Noble Gases by Electron Impact....Pages 341-355
Coulomb-Born Approximation for the Calculation of (e,2e) Cross-Sections....Pages 357-378
In Memorium Wolfgang Hink....Pages 381-381
Processes Other than Simple Outer Shell Ionization....Pages 383-392
Investigation of the Angular Dependence of Post Collision Interaction Effects Using Coincidence Techniques....Pages 393-402
Relativistic (e,2e) Processes under Bethe Ridge Conditions....Pages 403-407
Distorted-Wave Calculations of Triple Differential Cross Section for Inner Shell Ionization....Pages 409-421
Back Matter....Pages 423-436

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Content:
Front Matter....Pages i-ix
(e,2e), effective charges, distorted waves and all that!....Pages 1-32
Directions in (e,2e) and Related Processes....Pages 33-74
Near Threshold (e,2e) Ionisation of Helium and Atomic Hydrogen....Pages 75-81
Does Asymmetric (e,2e) Approach the Dipolar Limit at Intermediate Energies?....Pages 83-90
Knockout Reactions to Study Atomic and Molecular Electronic Structure: The Future....Pages 91-99
Absolute Experimental Cross Sections for Symmetric Coplanar (e,2e) Collisions of 45 to 500 eV Electrons With Helium....Pages 101-118
Recoil Ion Momentum Spectroscopy: A Complementary Technique to (e,2e) and (e,3e)....Pages 119-129
Arbitrary charged particle-impact ionisation of H and He: Scaling properties of cross sections....Pages 131-144
Electron Impact Ionisation-Excitation of Helium: Calculations Using Coupled Channel Parametric Potential Wavefunctions....Pages 145-164
Democratic Parameters for (e,2e) and (e,3e) Kinematics....Pages 165-170
Asymptotically Exact Distorted Wave Calculations....Pages 171-184
New Experiments Needed in (e,2e)....Pages 185-199
New Trends: Electron impact ionisation of laser excited atoms, and double ionisation by electron and photon impact....Pages 201-210
Laser-Assisted (e,2e) Collisions....Pages 211-222
(e,2e) Calculations Using a Correlated Final State....Pages 223-235
Solid state perspective in the theory of the Auger decay....Pages 237-258
High-Performance Computers in (e,2e) and (e,3e) Interactions with Atoms....Pages 259-264
Energy Loss and (e,2e) Studies of Molecules on Surfaces....Pages 265-272
Influence of Coulomb Forces on the Angular Momenta of Products in Three or More Fragmentary Reactions....Pages 273-280
Multiconfiguration Hartree-Fock Calculation of the Autoionization Resonance Parameters in the (e,2e) Reaction on Helium Atom....Pages 281-295
Near Threshold (?,2e) Experiments in the Perpendicular Plane....Pages 297-306
Multicoincidence Investigation of Ionization Dynamics....Pages 307-326
Coupling the Coplanar (e,2e) Geometry to the Perpendicular Plane Geometry....Pages 327-339
Double Ionization of Noble Gases by Electron Impact....Pages 341-355
Coulomb-Born Approximation for the Calculation of (e,2e) Cross-Sections....Pages 357-378
In Memorium Wolfgang Hink....Pages 381-381
Processes Other than Simple Outer Shell Ionization....Pages 383-392
Investigation of the Angular Dependence of Post Collision Interaction Effects Using Coincidence Techniques....Pages 393-402
Relativistic (e,2e) Processes under Bethe Ridge Conditions....Pages 403-407
Distorted-Wave Calculations of Triple Differential Cross Section for Inner Shell Ionization....Pages 409-421
Back Matter....Pages 423-436
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