Recoil Spectrometry DRS

The incident ions cause recoil in the surface atoms. In the studies of ionic liquids, only direct recoil was measured, that is motion in the forward direction. Watson and coworkers [73,74] used time-of-flight analysis with a pulsed ion beam to measure the kinetic energy of the scattered and sputtered ions and therefore determine the mass of the recoiled surface atoms. By relating the measured intensity of the sputtered atoms to the scattering cross section, the surface concentration may be found. The 

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