| 单词 | gamma radiation |
| 释义 | > as lemmasgamma radiation gamma radiation n. one of the three main forms of radiation emitted by radioactive material, consisting of electromagnetic waves of very short wavelength.Originally regarded as the third and most penetrating kind of radiation emitted by radium, and later shown to be identical with very short wavelength (very energetic) X-rays. Gamma radiation is now usually defined in terms of the mode of production: gamma rays are produced by the radioactive decay of atomic nuclei, while X-rays are produced by the deceleration of charged particles, esp. electrons, or by electron transitions in atoms. ΘΚΠ the world > matter > physics > atomic nucleus > radioactivity > gamma radiation > [noun] gamma radiation1904 1904 R. J. Strutt Becquerel Rays iii. 83 I have succeeded in observing the γ-radiation from 10 milligrammes of radium bromide. 1958 Listener 30 Oct. 704/1 Food-preservation by gamma radiation. 2008 I. M. Banks Matter iv. 67 Intense bursts of gamma radiation emanating from the floor/ceiling structure itself flooded either individual levels or the whole world. < as lemmas |
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