This volume contains the invited papers and selected contributed papers presented at the International Symposium on 'Electron-Molecule Scattering and Photoionization' held at SERC's Daresbury Laboratory, Cheshire, England from 18th to 19th July, 1987. This Symposium was a Satellite Meeting to the XVth International Conference on the Physics of Electronic and Atomic Collisions (ICPEAC I and follows a tradition of Satellite Meetings i. n related areas of collisions held in association with previous ICPEAC's. In order to make this volume as representative of the Symposium as possible 'Hot Topics' presented orally at the meeting together with a few papers selected by the Programme Committee from the contributed posters are included. The Editors are grateful to the authors for responding rapidly to the invitation to submit their contri butions for inclusion in the volume, as indeed they are grateful to all the authors for the high quality of their contributions. The Symposium brought together over 100 scientists from many countries and from broad interdisciplinary backgrounds to hear about current rapid advances in electron-molecule scatteri. ng and photoioniza tion. These advances have been stimulated on the experimental side by the increasing availability of electron beams with millivolt energy resolution, by synchrotron radiation sources and by intense tunable lasers. On the theoretical side the introduction of new computational methods enables accurate predictions to be made, resulting in a new and deeper understanding of the basic physical processes involved.

Inhalt
Photoionization dynamics of excited molecular states.- Double photoionization near threshold and via core hole states: Recent experimental results.- Multiple photoionization studied by photo-ion and photoelectron spectra.- Electron momentum spectroscopy of molecules: A review of recent developments.- Autodetachment spectroscopy of negative ions.- Recent experimental results related to shape resonances.- Threshold measurements of electron and photon collisions with atoms and small molecules.- Electron scattering in molecular oxygen: a high resolution study using a synchrotron radiation photoionization source.- Negative ion resonance electron scattering from oriented, physisorbed O2.- Rovibrational threshold structures in e-HC1 and e-HF collisions.- Photoelectron spectroscopy of HI and photoemission following narrowband VUV excitation.- Ab initio methods for electron-molecule collisions.- Electron scattering by polyatomic molecules: Recent advances in theory and calculations.- Resonance collisions of electrons with molecules and in solids.- Electronic excitation as a multichannel resonant process.- Electron-N2 cross sections at low energies calculated using a vibrational averaging procedure.- Very low energy e-N2 scattering and interim hybrid calculations of the ?g resonance.- Low energy electron scattering by diatomic molecules using the R-matrix method.- Calculated vibrationally and rotationally resolved photoelectron spectra of H2.- The effect of a change of charge: the scattering of low energy positrons by hydrogen molecules.- List of delegates.