| 词汇 | alpha-particle |
| 释义 | alpha particle noun[ C ] physics specializeduk /ˈæl.fə ˌpɑː.tɪ.kəl/ us /ˈæl.fə ˌpɑːr.t̬ə.kəl/ an extremely small piece of matter with a positive electrical charge, produced when a radioactive atom is broken down, usually in a nuclear reactionα粒子（放射性原子分裂时所产生的带正电荷的微小粒子，通常在核反应时产生） Physics: atoms, molecules & sub-atomic particles acceptor anti-radical antilepton antimatter antineutrino benzene ring beta decay beta particle hadron Higgs boson interatomic interelectronic interionic molecularly monatomic multi-molecular multiparticle muon positron relative atomic mass You can also find related words, phrases, and synonyms in the topics: Physics: radiation & radioactivity alpha particle | American Dictionaryalpha particle noun[ C ] us/ˈæl·fə ˌpɑr·t̬ɪ·kəl / physics a very small unit of matter with a positive electrical charge that is sent out by some radioactive substances Examples of alpha particlealpha particle We keep the subscript 0 upright for the nongyrotropic alphaparticle component. For frequencies less than the alphaparticle gyrofrequency, a negative energy alpha ion-cyclotron mode can interact with a positive energy proton-cyclotron mode. Most of the alphaparticle energy and a few of the neutron energy are deposited in the plasma during inertial time. After the target ignition, energetic charged particles generated by the alphaparticle are expanded in the mirror field. It provides proton, deuteron, alphaparticle and heavy ion beams of various energies to other institutions. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. When a (positive) alphaparticle approached sufficiently close to the nucleus, it was repelled strongly enough to rebound at high angles. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Americium is commonly used in industry as both an alphaparticle and low photon energy gamma radiation source. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Light elements absorb more energy of the alphaparticle, while alpha particles are reflected by heavy nuclei nearly with the same energy. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The decaying atom of plutonium-239 liberates an alphaparticle and a uranium-235 nucleus. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The alphaparticle is trapped in a potential well by the nucleus. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. One hydrogen nucleus was being knocked off by the impact of the alphaparticle, producing oxygen-17 in the process. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A lot of this waste is alphaparticle-emitting matter from the decay chains of uranium and thorium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Upon inspecting the zinc sulfide screen under a microscope, he noticed separate flashes of light created by individual alphaparticle collisions with the screen. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It then undergoes fission producing a gamma ray, an alphaparticle, and a lithium ion. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He turned to aluminium, which emitted an alphaparticle and produced sodium, which then decayed into magnesium by beta particle emission. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. See all examples of alpha particle These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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