antihelium

See also: antihélium

English

Etymology

From anti- +‎ helium.

Noun

antihelium (countable and uncountable, plural antiheliums)

1. (physics) The antiatom form of helium
   • 1987, K. N. Mukhin, Experimental Nuclear Physics: Elementary particle physics, page 134:

     In 1970, a more complex antinucleus, antihelium-3 (iHe), was discovered in the USSR.

   • 1994, Sven Kullander, Kullander Sven, Börje Larsson, Out of Sight!: From Quarks to Living Cells, →ISBN, page 218:

     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.

   • 2018, Borissov Guennadi, Story Of Antimatter, The: Matter's Vanished Twin, →ISBN, page 91:

     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.

Translations

antiatom form of helium

• Chinese:

  Mandarin: 反氦 (fǎnhài)

• Finnish: antihelium
• Italian: antielio (it) m
• Portuguese: anti-hélio m