ion scattering spectroscopy
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ion scattering spectroscopy[¦ī‚än ¦skad·ə·riŋ spek′träs·kə·pē]
A spectroscopic technique in which a low-energy (about 1000 electronvolts) beam of inert-gas ions in directed at a surface, and the energies and scattering angles of the scattered ions are used to identify surface atoms. Abbreviated ISS.