| 单词 | alpha radiation |
| 释义 | > as lemmasalpha radiation alpha radiation n. one of the three main forms of radiation emitted by radioactive material, consisting of alpha particles; cf. beta (or β) radiation at beta n. 2f(a), gamma radiation n. at gamma n. and adj. Compounds 2a. ΘΚΠ the world > matter > physics > atomic nucleus > radioactivity > alpha radiation > [noun] alpha radiation1899 1899 E. Rutherford in London, Edinb. & Dublin Philos. Mag. 47 116 These experiments show that uranium radiation is complex, and that there are present at least two distinct types of radiation—one that is very readily absorbed, which will be termed for convenience the α radiation, and the other of a more penetrative character, which will be termed the β radiation. 1936 N. Feather Introd. Nucl. Physics i. 5 Bragg..showed that the ionising effect of the α radiation ceased abruptly at a particular distance. 1972 M. H. Battey Mineral. for Students iii. 93/2 Small crystals of zircon, containing thorium, embedded in biotite, may by their α-radiation produce an intensely pleochroic halo. 2006 Daily Tel. 1 Dec. 4/1 The trail of the alpha-radiation was so strong that detectives have been able to follow it across London. < as lemmas |
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