antihydrogen


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Related to antihydrogen: antihelium

antihydrogen

[¦an·tē′hī·drə·jən]
(atomic physics)
The antimatter counterpart of hydrogen, whose atoms each consist of an orbiting positron and a nucleus that is an antiproton, antideuteron, or antitriton.
References in periodicals archive ?
Researchers at CERN, in an international effort led by a Canadian team, have used microwaves to manipulate antihydrogen atoms.
The antihydrogen atoms are trapped in a vacuum by the giant magnet, where they can be studied before they are deliberately released, Hangst said.
Unlike antihydrogen, however this unusual matter-antimatter hybrid, called positronium, is unstable.
We know we have confined antihydrogen atoms for at least 1,000 seconds.
Because hydrogen is the simplest of all atoms, antihydrogen is the easiest type of antimatter to produce in the laboratory.
Prevailing theories hold that antihydrogen and hydrogen are identical except for having constituents with opposite electrical charges.
Large quantities of antihydrogen atoms were first made at CERN eight years ago by two other teams.
In 2002 experiments at CERN managed to produce tens of thousands of antihydrogen atoms, a sufficient number to study this gas in its antimatter form.
3 Nature, the scientists estimate that they've produced about 50,000 atoms of antihydrogen, which last a few microseconds until they drift into the cylinder's walls and are destroyed, says CERN's Rolf Landua.
Making antihydrogen is much tougher because the ingredients-positrons (the positively charged antimatter counterparts of electrons) and antiprotons (the negatively charged antimatter counterparts of protons)-are significantly trickier to obtain, store, and control (SN: 10/21/95, p.
To create antihydrogen, they needed to bring these two components together so that a positron ends up orbiting an antiproton nucleus.
Confinement of particles with opposite charges and very different mass in the combined trap represents an important step towards the synthesis of antihydrogen," say Theodor W.