positron emission spectroscopy

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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