| 单词 | alpha decay |
| 释义 | alpha decay noun[U] physicsspecializeduk/ˌæl.fə dɪˈkeɪ/us/ˌæl.fə dɪˈkeɪ/theprocessin which aradioactivesubstancebreaksdown andemits(=produces)analphaparticle α衰变，阿尔法衰变Physical & chemical processes
Examplesofalpha decayalpha decay Due to thealphadecayof thorium and uranium, monazite contains a significant amount of helium, which can be extracted by heating. From Wikipedia  This example is from Wikipedia and may be reused under a CC BY-SA license.Mendelevium-256, the chemically most important isotope of mendelevium, decays through electron capture 90.7% of the time andalphadecay9.9% of the time. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Most of these decay predominantly throughalphadecay, but some undergo spontaneous fission. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.A half-life of 0.89 ms was calculated: decays into byalphadecay. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Alphadecaytypically occurs in the heaviest nuclides. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Lighter astatine isotopes have quite high energies ofalphadecay, which become lower as the nuclei become heavier. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.This activity was also observed from thealphadecayof flerovium-287. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.In 1983, they repeated the experiment using a new technique: measurement ofalphadecayfrom a decay product that had been separated out chemically. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Theoretical estimates ofalphadecayhalf-lives of isotopes of ununtrium are in good agreement with the experimental data. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Unstable nuclei may undergoalphadecay, in which they emit an energetic helium nucleus, or beta decay, in which they eject an electron (or positron). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Unlike beta decay,alphadecayis governed by the interplay between the nuclear force and the electromagnetic force. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Alphadecay, the release of a high-energy helium nucleus, is the most common form of radioactive decay for plutonium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.After observing the fivealphadecayevents that generate dubnium-268, spontaneous fission events were observed with a long half-time. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Astatine'salphadecayenergies follow the same trend as for other heavy elements. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.These decays have been linked to an isomeric level decaying byalphadecaywith a half-life of 19 s. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.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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