Thermal energy atom scattering

Surface resonance Raman spectroscopy Surface Raman spectroscopy specular reflectance speetroscopy Scanning tunneling microscope Sinface-unenhanced Raman spectroscopy Soft X-ray appearance potential spectroscopy Soft X-ray emission spectroscopy Thermodesorption mass spectroscopy Thermal energy atom scattering Third harmonic generation Thin layer cell... 

TEAS TED TOE-SARS Thermal Energy Atomic Scattering Transmission Electron Diffraction Time-of-Flight Scattering and Recoiling Spectroscopy ... 

Poelsema B., Comsa G., Scattering of Thermal Energy Atoms from Disordered Surfaces, Springer Tracts in Modem Physics, Berlin Springer Verlag, 1989, Vol. 115. 

A thermal energy atomic beam (20-200 meV) has a wavelength on the order of inter-atomic distances. The atomic beam diffracts from a contour of the surface potential corresponding to the beam energy. This contour is located 3-4 A above the ion cores in the outermost layer of the surface. Atomic beam diffraction patterns are normally interpreted using model surface scattering calculations, where the scattering is described as a Van der Waals interaction. 

Fast neutrons rapidly degrade in energy by elastic collisions when they interact with low atomic number materials. As neutrons reach thermal energy, or near thermal energies, the likelihood of capture increases. In present day reactor facilities the thermalized neutron continues to scatter elastically with the moderator until it is absorbed by fuel or non-fuel material, or until it leaks from the core. 

The technique for investigating scattering processes in crossed-beam experiments is well developed. For example, elastic scattering experiments with neutral particles at thermal energies are well understood,85 and the techniques for producing molecular and alkali atom beams and to detect them and interpret their kinematics has been reviewed on several occasions.86, 87. The new aspect of the present work is the technique for... 

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