词汇 | gamma-ray |
释义 | gamma ray noun[ Cusually plural ] physicsuk /ˈɡæm.ə ˌreɪ/ us /ˈɡæm.ə ˌreɪ/ a beam of gamma radiationγ射线 Physics: radiation & radioactivity alpha particle background radiation decay electromagnetic radiation gamma radiation half-life luminosity non-ionizing non-irradiated nonradioactive post-irradiation radioisotope sievert spectrometer spectrometric spectrometry UPF UVA UVB weak force Polonium contains especially alpha rays and a few gamma rays. In the case of uranium, the alpha rays have extremely slight penetrating power, and cannot even impress photographic plates. That was the dangerous kind, because both beta particles and gamma rays could penetrate clothing and skin. Examples of gamma raygamma ray Natural phenomena such as mass extinctions, supernovae and gammaray bursters are more problematic for civilization. Recent investigations of cosmological gammaray bursts suggest that these too could cause ozone depletion. The exact form of the source modulation and the nuclear-resonant thickness of the resonant absorber determines the shape of the time-differential resonant gammaray transmission spectrum. To my knowledge, gammaray irradiation has been known to scientists for over 30 years. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 We know all that there is to be known about gammaray irradiation at the present time. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 The chamber would manipulate the gammaray into a way that it could be recorded. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. At present, ytterbium is mainly used as a dopant of stainless steel or active laser media, and less often as a gammaray source. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This low gammaray production rate makes it more difficult to find and identify this isotope. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The atom is not ionised, and the gammaray continues on, although at a lower energy. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. During this interaction, energy is transferred from the gammaray to the electron, which is a directly ionizing particle. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A secondary gammaray with less energy (hence lower frequency) also emerges from the interaction. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The neutron can be detected by its capture on an appropriate nucleus, releasing a gammaray. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Iridium-192 is also a strong gammaray emitter. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Iridium-192 is commonly used as a gammaray source in industrial radiography to locate flaws in metal components. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The constituent elements of the sample absorb some of these neutrons and emit prompt gamma rays which are measured with a gammaray spectrometer. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. See all examples of gamma ray 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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