| 单词 | alpha particle |
| 释义 | alpha particle (once / 66401 pages) n WORD FAMILY alpha particle: alpha particles USAGE EXAMPLESIt shoots off alpha particles that travel only a few inches and cannot penetrate the skin. New York Times(Jun 19, 2016) With two Manchester graduate assistants, Hans Geiger and Ernest Marsden, he set about finding one, using alpha particles as his tools. Michael Hiltzik, Big Science(2015) Those slabs, he said, are at least 6 feet underground and painted over to prevent the escape of radioactive alpha particles. Washington Times(Oct 17, 2015) n a positively charged particle that is the nucleus of the helium atom; emitted from natural or radioactive isotopes Hyper particle, subatomic particle a body having finite mass and internal structure but negligible dimensions |
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