positron emission spectroscopy

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positron emission spectroscopy [′päz·ə‚trän i¦mish·ən spek′träs·kə·pē]

(spectroscopy)

A technique in which a solid surface is bombarded with a low-energy monoenergetic positron beam and the energies of positrons emitted from the surface are measured to determine the amounts of energy lost to molecules adsorbed on the surface.

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