| 词汇 | antimatter |
| 释义 | antimatter noun[ U ] uk /ˈæn.tiˌmæt.ər/ us /ˈæn.t̬iˌmæt̬.ɚ/ matter that consists of particles that have the opposite electrical characteristics of the particles in regular matter反物质 Physics: atoms, molecules & sub-atomic particles acceptor alpha particle anti-radical antilepton antineutrino antiparticle beta decay beta particle Higgs boson interatomic interelectronic interionic intermolecular monatomic multi-molecular multiparticle muon neutrino positron relative atomic mass antimatter | American Dictionaryantimatter noun[ U ] us/ˈænt·iˌmæt̬·ər, ˈæn·tɑɪ-/ physics matter that consists of particles (= small parts of atoms) that have the opposite electrical characteristics of the particles in regular matter Examples of antimatterantimatter Consequently, antimatter requirements are much lower than those of pure-antimatter systems. However, there are several technical hurdles to be overcome before an antimatter rocket can be built. All of those missions could be performed by fusion or antimatter rockets with a mass ratio of 5:1 or less. The principle is simple: an equal mixture of matter and antimatter provides the highest energy density of any known propellant. Even with the improved antiproton production and storage capacities expected soon, this amount of antimatter is beyond our reach. The first is that antimatter does not exist in significant amounts in nature, at least, not anywhere near this solar system. The main mechanism for heating the liquid droplet is antimatter-induced fission fragments which have a range of 45 mm in the droplet. I shall argue that the acceleration is a consequence of the excess of matter over antimatter in the universe. For missions within the solar system and into near interstellar space, antimatter requirements for the catalyzed concepts are many orders of magnitude lower than their pure antimatter counterparts. Antimatter annihilation requires antimatter, which is hard to come by in this matter filled world. Appropriate vessel designs will be presented for fusion as well as for antimatter propulsion. Until we get nuclear power and antimatter, we should be conserving our resources. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Iridium is used in particle physics for the production of antiprotons, a form of antimatter. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. If matter and antimatter responded oppositely to a gravitational field, then it would take no energy to change the height of a particle-antiparticle pair. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Direct experiments on neutral antihydrogen have not detected any difference between the gravitational interaction of antimatter, compared to normal matter. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. 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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