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Research Technology

Neutron scattering techniques help to reveal the secrets of nature at microscopic and atomic level.

THE STRUCTURE AND DYNAMICS OF MATTER REVEALED

Most people know that X-ray methods and microscopy can be used for studying objects in detail. Despite refinements these methods are not always adequate.

Bertram N. Brockhouse and Clifford G. Shull were awarded the Nobel Prize in Physics 1994 for pioneering contributions to the development of neutron scattering techniques for studies of condensed matter.

For more information, look up www.nobel.se

Photos and text © The Nobel Foundation

DYNAMIC DEVELOPMENT

Neutron scattering techniques are powerful methods to analyse both solid and fluid (condensed) matter. Generally monochromatic neutrons are used for scattering experiments. The incident neutrons are scattered without change in their energy (elastic scattering), which provides information about the arrangement of atoms in material. The neutrons can undergo a change in the energy on scattering, which gives information about the movement of atoms in a fluid, i.e. the dynamics of the atom.

Bertram N. Brockhouse

McMaster University, Hamilton, Ontario, Canada, receives one half of the 1994 Nobel Prize in Physics for the development of neutron spectroscopy.

Clifford G. Shull

MIT, Cambridge, Massachusetts, USA, receives one half of the 1994, Nobel Prize in Physics for development of the neutron diffraction technique.

These methods, rewarded with the Nobel prize in 1994, are used in widely different areas such as the study of new ceramic superconductors, catalytic exhaust cleaning, elastic properties of polymers and virus structure. Neutron research lead to several Nobel prizes and supported other topics (see www.nobel.se).

New techniques using neutron research are evolving, based on the well-developed principles of the initial work. This ensures the use of research reactors even if they have lower neutron

fluxes compared to the high flux reactors delivering 1018 - 1019 neutrons/m2/s. New ideas are evolving as 3-D tomography, tomography snapshots and applications in environment, mining and industry.

A strong community of several thousands of researchers are using research reactors. However, new ideas demand new co-operations and new co-ordinated research interfacing different branches of science.