Noun
(physics, uncountable) The antimatter equivalent of hydrogen, consisting of an antiproton and an positron (antielectron).
(physics, countable) An atom of the antimatter equivalent of hydrogen.
Source: en.wiktionary.orgAntihydrogen was first produced by ATHENA in 2002, citation and then by ATRAP citation and by 2004, millions of antihydrogen atoms were made. Source: Internet
In 2011, CERN scientists were able to preserve antihydrogen for approximately 17 minutes. Source: Internet
In June 2011, trapped 309 antihydrogen atoms, up to 3 simultaneously, for up to 1,000 seconds. citation citation They then studied its hyperfine structure, gravity effects, and charge. Source: Internet
On 26 April 2011, ALPHA announced that they had trapped 309 antihydrogen atoms, some for as long as 1,000 seconds (about 17 minutes). Source: Internet
Some hundreds of millions of antihydrogen atoms have been made in this fashion. Source: Internet
The antihydrogen atoms created during PS210 and subsequent experiments (at both CERN and Fermilab) were extremely energetic and were not well suited to study. Source: Internet