helium nucleus

collocation in English

meaningsofheliumandnucleus

These words are often used together. Click on the links below to explore the meanings. Or,see other collocations withnucleus.
helium
noun[U]
uk
/ˈhiː.li.əm/us
/ˈhiː.li.əm/
a chemical element that is a gas lighter than air, that will not burn and is used in balloons, airships, and some types ...
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nucleus
noun[C]
uk
/ˈnjuː.kli.əs/us
/ˈnuː.kli.əs/
physicsspecialized
the central part of an atom, usually made up of protons ...
See more atnucleus

(Definition ofheliumandnucleusfrom theCambridge English Dictionary© Cambridge University Press)

Examplesofhelium nucleus

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Unstable nuclei may undergo alpha decay, in which they emit an energeticheliumnucleus, or beta decay, in which they eject an electron (or positron).
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Alpha can be stopped quite easily by a few centimetres in air or a piece of paper and is equivalent to aheliumnucleus.
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Alpha decay, the release of a high-energyheliumnucleus, is the most common form of radioactive decay for plutonium.
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Before the iron decays, it can fuse with anotherheliumnucleus, creating unstable nickel-56.
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Before the chromium decays, it can fuse with anotherheliumnucleus, creating unstable iron.
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In alpha decay the radioactive element decays by emitting aheliumnucleus(2 protons and 2 neutrons), giving another element, plus helium-4.
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Before the titanium decays, it can fuse with anotherheliumnucleus, creating unstable chromium.
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Alpha decay occurs when the nucleus ejects an alpha particle (heliumnucleus).
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It may also be an atomic nucleus devoid of electrons, such as an alpha particle, aheliumnucleus.
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One stable nucleus of calcium fuses with oneheliumnucleus, creating unstable titanium.
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Aheliumnucleuswas presumed to be composed of four protons plus two nuclear electrons (electrons bound inside the nucleus) to cancel two of the charges.
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A diproton is not stable, so neutrons must also be involved, ideally in such a way that aheliumnucleus, with its extremely tight binding, is one of the products.
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The antiproton's orbit, which has a large principal quantum number and angular momentum quantum number of around 38, lies far away from the surface of theheliumnucleus.
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Alpha process elements (or alpha elements) are so-called since their most abundant isotopes are integer multiples of four, the mass of theheliumnucleus(the alpha particle).
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In short: when four protons fuse to become oneheliumnucleus, two of them have to convert into neutrons, and each such conversion releases one electron neutrino.
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Cosmic galaxy radiation possesses the important constituent of 12 % alpha particles (helium nuclei), 1.3% heavy ions, and 1% electrons.
From theCambridge English Corpus
The splitting of the lithium nuclei produced helium nuclei.
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Instead, the interiors of stars in the horizontal branch transform three helium nuclei into carbon by means of this triple-alpha process.
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In stars, rapid nucleosynthesis proceeds by adding helium nuclei (alpha particles) to heavier nuclei.
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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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