英语词汇“alpha particle”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

alpha particle n. a positively charged particle consisting of two protons and two neutrons bound together (as in the nucleus of a helium atom) and emitted by a radioactive substance as alpha radiation.So named before it was identified with the helium nucleus: see alpha radiation n. and quot. 1908.

ΘΚΠ

the world > matter > physics > atomic nucleus > radioactivity > alpha radiation > [noun] > particle in

alpha particle1903

1903 E. Rutherford in Nature 20 Aug. 366/2 The determination of the mass of the α body..supports the view that the α particle is in reality helium.

1908 E. Rutherford & H. Geiger in Proc. Royal Soc. A. 81 172 We may conclude that an α-particle is a helium atom, or, to be more precise, the α-particle, after it has lost its positive charge, is a helium atom.

1925 F. Soddy in Evol. Light Mod. Knowl. x. 371 The radiant α- and β-particles expelled by the radioelements.

1949 H. Yagoda Radioactive Measurem. with Nucl. Emulsions i. 6 These emulsions, intended for the registration of alpha-particle, proton, and fission-fragment tracks, are conveniently referred to as Nuclear Emulsions.

1990 J. D. Barrow Theories of Everything (1991) v. 95 Two alpha particles combine under stellar conditions to make a nucleus of the element beryllium.

2001 O. Sacks Uncle Tungsten xxiii. 287 The tiny sparks or scintillations one saw came from the disintegration of individual atoms of radium, from the individual alpha particles each shot off as it exploded.

单词	alpha particle
释义	> as lemmas alpha particle alpha particle n. a positively charged particle consisting of two protons and two neutrons bound together (as in the nucleus of a helium atom) and emitted by a radioactive substance as alpha radiation.So named before it was identified with the helium nucleus: see alpha radiation n. and quot. 1908. ΘΚΠ the world > matter > physics > atomic nucleus > radioactivity > alpha radiation > [noun] > particle in alpha particle1903 1903 E. Rutherford in Nature 20 Aug. 366/2 The determination of the mass of the α body..supports the view that the α particle is in reality helium. 1908 E. Rutherford & H. Geiger in Proc. Royal Soc. A. 81 172 We may conclude that an α-particle is a helium atom, or, to be more precise, the α-particle, after it has lost its positive charge, is a helium atom. 1925 F. Soddy in Evol. Light Mod. Knowl. x. 371 The radiant α- and β-particles expelled by the radioelements. 1949 H. Yagoda Radioactive Measurem. with Nucl. Emulsions i. 6 These emulsions, intended for the registration of alpha-particle, proton, and fission-fragment tracks, are conveniently referred to as Nuclear Emulsions. 1990 J. D. Barrow Theories of Everything (1991) v. 95 Two alpha particles combine under stellar conditions to make a nucleus of the element beryllium. 2001 O. Sacks Uncle Tungsten xxiii. 287 The tiny sparks or scintillations one saw came from the disintegration of individual atoms of radium, from the individual alpha particles each shot off as it exploded. extracted from alphan.adj. < as lemmas
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