Word: antihydrogen
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...positron, antiproton and antineutron—share the same masses and magnitudes of charge as those of their counterparts in matter—electron, proton and neutron, but with opposite charges. Just as a proton and electron compose a hydrogen atom, an antiproton and positron make an antihydrogen atom. When matter and antimatter particles collide, they destroy each other in a burst of energy...
Chair of the Department of Physics John Huth called Gabrielse’s work a “tour de force.” “It would be a rather tremendous discovery if he found that there were distinct differences between the properties of hydrogen and antihydrogen,” he adds...
This year, in a lab in Geneva, Gabrielse developed novel ways to produce antihydrogen atoms using lasers, map their internal structures and measure their speeds—three techniques which have never been used before...
...electron in a cesium atom into a higher orbit. When the cesium atom collides with a positron, the electron binds with the positron, to create an atom that is half matter and half antimatter. When that atom collides with an antiproton, the positron binds to the antiproton, forming an antihydrogen atom...
...addition, Gabrielse’s team was able to measure the distance between the positron and antiproton in an antihydrogen atom by the magnitude of the voltage required to pull the two particles apart, enabling them to better map the internal structure of the atom...