antihelium en · NOUN
Etymology
From anti- + helium.
Meanings
-
(countable, particle, uncountable) The antiatom form of helium
In 1970, a more complex antinucleus, antihelium-3 (iHe), was discovered in the USSR.
1987, K. N. Mukhin, Experimental Nuclear Physics: Elementary particle physics, page 134:In principle the energy should have been enough for the production of even heavier antinuclei. However, the probability for production of heavier masses is very tiny, and antihelium-3 is still the heaviest known antielement.
1994, Sven Kullander, Kullander Sven, Börje Larsson, Out of Sight!: From Quarks to Living Cells, →ISBN, page 218:After several launches of their balloon, the scientists registered more than 40 million nuclei of helium in the cosmic rays, but not a single nucleon of antihelium.
2018, Borissov Guennadi, Story Of Antimatter, The: Matter's Vanished Twin, →ISBN, page 91:
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| antiheliums | Number=Plur | lexicographic |
Translations (5)
pt anti-hélio (antiatom form of helium) · fr antihélium (antiatom form of helium) · it antielio (antiatom form of helium) · cmn 反氦 (antiatom form of helium) · fi antihelium (antiatom form of helium)