Wavefunctions and Mechanisms from Electron Scattering Processes

The present Volume of Lecture Notes in Chemistry fulfils one of the stated aims of the Series, that of disseminating results discussed and evaluated at recent scientific international conferences; in our case a Satellite Meeting of the well-known Conference Series on the Physics of Electronic and Atomic a:ollisions, the XIIIth ICPEAC, which took place in Castelgandolfo, near Rome, from 23 to 25 July 1983. Since the Satellite Meeting attracted a widely international and in­ terdisciplina~y audience whose general consensus was one of warm appro­ val for the scie'ntific level achieved during it, we hope that the pre­ sent collection of essays will be met by similar success, thus warran­ ting our having asked the participants to work still further for us. Before turning to their efforts, however, it is only just to thank the Italian National Research Council (Chemistry Committee and Physics Committee), the University of Rome, the C.N.R. Tnstitute H.A.I. of the Rome Research Area (Montelibretti) and the E.N.E.A. Organisation for their financial aid, which made the Castelgandolfo Meeting possible. We warmly acknowledge the professional expertise of the staff at Villa Montecucco and for their collaboration we are grateful to: Rita Abbasciano, Catherine Cajone, Lucilla Crescentini, .Roberta Fantoni, An­ tonio Montani, Amedeo Palma, Rosario Platania, Maurizio Venanzi.

I Low Energy Electron-Molecule Scattering: The Experimental Findings.- Experimental results in electron-molecule inelastic collision experiments.- Low-energy electron scattering in organic molecules.- Electron affinities of orqanic and organometallic compounds determined by means of electron transmission spectroscopy.- Shape resonances in electron-polyatomic molecules collisions.- Low energy experiments on electron-molecule inelastic collisions and threshold peaks: experimental advances.- Dissociative attachment in polar and highly polar molecules.- II Low Energy Electron-Molecule Scattering: The Theoretical Tools.- R-matrix theory of electron-molecule collisions.- Polarization and correlation effects in low energy electron-molecule collisions.- The scattering of slow electrons by polyatomic molecules.- Characterisation of electronuclear correlations in low-energy electron molecule dynamics.- Calculation of effective potentials for the study of shape resonances in open shell diatomics.- Continuum multiple scattering ?? calculations of elastic cross sections in electron-molecule scattering.- Projection operator calculations for molecular shape resonances in the optical potential approach.- Electron scattering by N2: from muffin-tin to MCSCF potentials.- On the finite volume variational method based on the logarithmic derivative of the wave function.- A theoretical study of the (Inline) system at low energies.- Dissociative attachment of H2 and its isotope by low energy electron impact.- Numerical asymptotic functions in calculations of electron-molecule scattering.- III Coupling Nuclear Motion with the Impinging Electron: Theoretical Models.- Resonant and non-resonant couplings to the nuclei in electron-molecule collisions.- Non-resonant treatment of associative detachment and dissociative attachment.- Electron dissociative attachment on HCl molecules.- Resonance-resonance coupling in dissociative electron attachment.- Calculation of cross sections for dissociative attachment and vibrational excitation in HCl beyond the local complex potential approximation.- IV Scattering of High-Energy Electrons by Atoms and Molecules: Experimental Studies.- Dipolar electron-molecule experiments.- (e,2e) Chemistry.- Fourier transform of spherically averaged momentum densities.- High resolution studies of inner-shell excited states of atoms and molecules by electron impact excitation.- K-edge excitation in N2, NO, N20 and BF3 studied by angular resolved electron energy-loss spectroscopy.- Correlation effects in Neon studied by elastic and inelastic high energy electron scattering.- Coincidence measurement of the anisotropy of L3M23M23 (1S0) Auger electrons of Argon.- V Molecular Excitation by Electron Impact: The Theoretical Treatments.- Electronic excitation of molecules by electron impact.- High energy electron scattering and electron correlation in atoms and molecules.- Line-shape analysis of energy-loss spectra and photoelectron spectra.- Hole localization effects in molecular inner shell excitation.- The inadequacy of first order theoretical models for ionisation.- VI (e,2e) Reactions for Atoms and Molecules: Experiments and Theoretical Comparisons.- Impulsive (e, 2e) experiments: non dipolar form factor.- Multiple scattering approach to the interpretation of (e,2e) experiments.- The asymmetric (e,2e) reaction at high energy.- Multiple scattering approach to the (e, 2e) reaction of atomic hydrogen.- (e,2e) experiments on He in asymmetric conditions at intermediate energy.- Coincidence measurements in (e,2e) Compton scattering and microcanonical electronic structures.- (e,3e) collisions: a prospective study.- Index of Contributors.