Abstract

The neutron scattering technique has been applied in earnest to condensed matter and materials research following the construction of reactor neutron sources in the mid-1940s. Today reactor sources are used to obtain results that pervade these subjects and applications in biology and physical chemistry are growing rapidly. The development of accelerator-based spallation sources, in which protons liberate neutrons from a heavy metal target, opens new frontiers through both the enhancement of available neutron flux and the inherent time structure of the beams. We survey the particular advantages of advanced pulsed sources with illustrations taken from recent work using the spallation source ISIS, sited at the Rutherford Appleton Laboratory. Topics of work include surface science, structure determination and molecular and neutron-electron spectroscopy. Finally we sketch the current development of new instrument technology and foreseeable applications.

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