| 单词 | antihydrogen |
| 释义 | > as lemmasantihydrogen (c) Forming the names of atomic nuclei or chemical elements composed of antiparticles, as antideuteron, antihelium, antihydrogen, etc.; (also, in antiatom) denoting an atom composed of antiparticles.In quot. 1898: a type of hypothetical atom which is gravitationally repelled by other atoms. ΚΠ 1898 A. Schuster in Nature 18 Aug. 367/2 The atom and the anti-atom may enter into chemical combination, because at small distances molecular forces would overpower gravitational repulsion.] 1953 Pop. Mech. Aug. 216/2 An atom of ‘antihydrogen’ would have a positron revolving around a negative proton as the nucleus. 1970 Times 23 Feb. 5/6 Soviet physicists have reported the creation and detection of nuclei of anti-helium. 1996 Daily Tel. 4 Jan. 4/8 An ‘anti-atom’—the element antihydrogen—has been created by scientists, marking the first foray into a world of anti-matter than has long been the domain only of science fiction writers. 2013 Proc. 10th UCLA Symp. Sources & Detection Dark Matter & Dark Energy in Universe 106 Cosmic-ray protons or antiprotons interact with the interstellar medium to produce antideuterons. < as lemmas |
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