Polarized Electron/Polarized Photon Physics

The EPSRC (Engineering and Physical Science Research Committee of the U. K. ) suggested two Workshops (York University, 22-23 September, 1993 and 15-16 April, 1994) for possible development of polarized electron/photon physics as targeted areas of research. The remit of these meetings included identifying research groups and their activities in polarized electron/polarized photon physics, listing relevant existing facilities (particularly electron spin sources and polarimeters), possible joint projects between research groups in the U. K. , recognizing future needs of projects for research of the highest scientific merit and referring to international comparisons of these research activities. Although very diverse but interconnected, the areas of research presented at the Workshops embrace atomic, molecular, surface, and solid state physics. In more detail these areas covered: electron spin correlations and photon polarization correlations in atomic and molecular collisions and photoionization, electron spin effects in scanning tunneling microscopy, surface and interface magnetism from X-ray scattering and polarized Auger electrons (including analysis of domain structures in solids and surfaces), polarized electrons from multiphoton ionization, quasi-atomic effects in solid state physics, dichroism in molecular and surface processes, Faraday rotation and high-field magneto-optics and polarization effects in simultaneous higher order electron-photon excitations. It is obvious from the spectrum of research fields presented at the Workshops that physicists of primarily two communities, namely those studying electron and photon spin interactions with gaseous atomic and molecular targets and those using condensed matter targets for their studies, interacted very closely witheach other.

Résumé
Proceedings of two United Kingdom Engineering and Physical Science Research Committee workshops held in York, England, September 22-23, 1993 and April 15-16, 1994

Contenu
Introductory Remarks on Polarized Electron/Polarized Photon Physics.- Measurement of Exchange and Spin-Orbit Interaction Effects in Elastic Electron-Cesium Scattering.- Theory of Electron Spin-Effects in Electron-Atom Scattering.- Correlations Studies of Electron Impact Excitation Past, Present, Future.- Polarization Correlations from Electron Impact Excitation of Earth Alkaline Atoms.- Electron Polarimetry on the Synchrotron Radiation Source (SRS).- Sources and Detectors of Polarized Electrons.- Electron Spin Polarimetry Instrumentation Survey: 1994.- A Bolt-On Source of Spin Polarised Electrons for Studies of Surface Magnetism.- Spin Polarized Electron Detectors for Surface Magnetism.- Resonance Line Radiation from Spin Polarized Sodium and Potassium Atoms.- Studies with Polarized Positrons.- Polarization Effects in Simultaneous Electron Photon Excitation.- Polarization Correlation and Coherence Lengths of Two-Photon Radiation.- Some Theoretical and Computational Results for Electron Molecule Scattering.- Spin Dependent Electron Scattering from Oriented Molecules: An Experimental Appraisal.- Photoionisation and Fluorescence of Calcium and Strontium in Their P-D Giant Resonance Regions.- Faraday Rotation in the UV/VUV and High Field Magneto-Optics.- Stepwise Multiphoton Study of Ytterbium.- Spin-Polarised Electron Scattering in Condensed Matter An Atomic Approach.- Magneto-Optic Kerr Effect Studies of Ultrathin Magnetic Structures.- Magnetic X-Ray Dichroism. An Effective way to Study the Spin and Orbital Magnetization in Magnetic Materials.- X-Ray Magnetic Scattering.- Spin-Polarised Scanning Tunnelling Microscopy and Relevant Techniques A Survey of Present Status.- Series Publications.