Atomic and molecular photoionization studies using synchrotron radiation

Measurements made at the Daresbury SRS on a selection of atoms and small molecules are presented in this review, where the emphasis is on the effects of electron correlations and the means of quantifying them by focussing on resonant structure in the photoionization continuum. The use of the techniques of angle resolved electron spectrometry, fluorescence polarization analysis and merged ion beam spectrometry to highlight these effects is discussed, as well their application in providing fundamental data on the photoionization process. The results presented have been chosen not only to give an indication of our present state of understanding of this field, but also to show how it is likely to develop in the future, in the context of the newly established coincidence spectroscopies and the opportunities presented by the next generation of synchrotron radiation sources. (author) 60 refs