| 词汇 | beta-particle |
| 释义 | beta particle noun[ C ] physics specializeduk /ˈbiː.tə ˌpɑː.tɪ.kəl/ us /ˈbeɪ.t̬ə ˌpɑːr.t̬ə.kəl/ an extremely small piece of matter with a positive or negative electric charge, produced when a radioactive atom is broken downß粒子（在原子放射性衰变中产生的一种粒子，带一个正电荷或负电荷） Physics: atoms, molecules & sub-atomic particles acceptor alpha particle anti-radical antilepton antimatter antineutrino benzene ring beta decay 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 That was the dangerous kind, because both beta particles and gamma rays could penetrate clothing and skin. The beta particles emanating from radium were soon identified with the electrons of the cathode ray. They are much larger than beta particles, and have less penetrative power. beta particle | American Dictionarybeta particle noun[ C ] us/ˈbeɪ·t̬ə ˌpɑr·t̬ɪ·kəl/ beta (+) particlechemistry, physics (alsobeta (–) particle) an extremely small piece of matter with a positive or negative electric charge, produced when an atom is broken down. A beta (+) particle is the same as a positron; a beta (–) particle is an electron. Examples of beta particlebeta particle He turned to aluminium, which emitted an alpha particle and produced sodium, which then decayed into magnesium by betaparticle emission. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In other cases the product nucleus is unstable and decays, typically emitting protons, electrons (betaparticle) or alpha particles. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He tried lead, without success, and then fluorine in the form of calcium fluoride, which emitted an alpha particle and produced nitrogen, decaying into oxygen by betaparticle emission. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. There are several different kinds of these particles, but the majority are alpha particles, beta particles, neutrons, and protons. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Count rates are normally associated with the measurements of particles, such as alpha particles and beta particles. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Negatively charged beta particles or positively charged alpha particles, positrons or fission fragments may be utilized. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Although beta particles scatter much more than alpha particles, a range can still be defined; it frequently amounts to several hundred centimeters of air. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These systems use radioisotopes that produce low energy beta particles or sometimes alpha particles of varying energies. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A material that spontaneously emits this kind of radiationwhich includes the emission of alpha particles, beta particles, and gamma raysis considered radioactive. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. There are special plastic shields that stop beta particles, and air will stop most alpha particles. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Typical particles include alpha particles, beta particles and neutrons, as well as mesons that constitute cosmic rays. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The first beta decays are rapid and may release high energy beta particles or gamma radiation. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Beta particles are electrons or positrons and can travel farther than alpha particles in air. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Such contamination presents a hazard because of the radioactive decay of the contaminants, which emit harmful ionising radiation such as alpha particles or beta particles, gamma rays or neutrons. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A sample of radium metal maintains itself at a higher temperature than its surroundings because of the radiation it emits alpha particles, beta particles, and gamma rays. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. See all examples of beta 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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