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Neutron Scattering

Neutron Scattering. All Allen . What is it?. Neutron Scattering is a method used to study the internal structure to make up matter using/firing neutrons. How does it work?. Neutrons of known energies are fired at the target material being analysed and undergo collision with the nuclei

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Neutron Scattering

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  1. Neutron Scattering All Allen 

  2. What is it? • Neutron Scattering is a method used to study the internal structure to make up matter using/firing neutrons

  3. How does it work? • Neutrons of known energies are fired at the target material being analysed and undergo collision with the nuclei • There are two types of neutron scattering; • Inelastic • Measures the energy transferred to the nuclei to allow Dynamic (Movement within structure) properties to be analysed • Elastic • Measures the momentum transferred to the nuclei to allow structural properties to be analysed.

  4. The Physics Behind it • Neutron scattering uses the wave nature of neutrons to interact with the material, scatter and form an interference pattern. • The nature of the interference pattern is dependent upon the energy of the incoming neutrons (Controlled), and the atomic structure of the material. • Thus, by analysing the interference patterns produced and knowing the energy of the neutrons, we are able to determine the structure of the material.

  5. Suitability of Neutron Scattering • Due to the properties of neutrons, neutron scattering is a more effective method than techniques which uses electrons or protons to probe materials. • While electrons and protons do pass through crystal and diffract, they are deflected by charges in the structure and hence, produce errors • According to de Broglie’s matter-wave theory, neutrons have a wavelength shorter than light, similar to the wavelength of an electron. • Thus, neutrons are useful in studying smaller nuclei whereas X-rays are preferred for the study of larger nuclei.

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