| 单词 | positronium velocity spectroscopy |
| 释义 | positronium velocity spectroscopy [´päz·ǝ`trō·nē·ǝm vǝ`läs·ǝd·ē spek`träs·kǝ·pē] SPECTROSCOPY A technique in which a solid surface is bombarded with a low-energy monoenergetic positron beam and the velocities of the emitted positronium atoms are measured to determine the energy and momentum spectrum of the density of electron states near the surface. |
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