| 释义 |
alpha ray
alpha rayn.1. A rapidly moving alpha particle.2. A narrow beam of such particles.alpha ray n (General Physics) ionizing radiation consisting of a stream of alpha particles al′pha ray`
n. a stream of alpha particles. Also called al′pha radia`tion. [1900–05] alpha ray A stream of alpha particles.Thesaurus| Noun | 1. |  alpha ray - the radiation of alpha particles during radioactive decayalpha radiationionizing radiation - high-energy radiation capable of producing ionization in substances through which it passescorpuscular radiation, particulate radiation - a stream of atomic or subatomic particles that may be charged positively (e.g. alpha particles) or negatively (e.g. beta particles) or not at all (e.g. neutrons) |
Translationsalpha ray
al·pha par·ti·cle (α), a particle consisting of two neutrons and two protons, with a positive charge (2e+); emitted energetically from the nuclei of unstable isotopes of high atomic number (elements of mass number from 82 up); identical to the helium nucleus. Synonym(s): alpha rayalpha rayA ray composed of positively charged helium particles derived from atomic disintegration of radioactive elements. Its velocity is one tenth the speed of light. Alpha rays are completely absorbed by a thin sheet of paper and possess powerful fluorescent, photographic, and ionizing properties. They penetrate tissues less than beta rays. See also: rayal·pha par·ti·cle (alfă pahrti-kĕl) A particle consisting of two neutrons and two protons, with a positive charge; emitted energetically from the nuclei of unstable isotopes of mass number 82 and up.
Synonym(s): alpha ray. alpha ray
Related to alpha ray: beta raySynonyms for alpha raynoun the radiation of alpha particles during radioactive decaySynonymsRelated Words- ionizing radiation
- corpuscular radiation
- particulate radiation
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