Stick Up: Antimatter Atoms Trapped for More Than 15 Minutes: Scientific American: "'We think we're in a position to start measuring something,' says ALPHA spokesperson Jeffrey Hangst of Aarhus University in Denmark. Initial studies will involve irradiating the anti-atoms with microwaves to try to engage them in a resonant interaction, flipping their spin like a compass needle swinging from north to south.
Critically, the confinement times achieved by ALPHA imply that the antihydrogen atoms have had time to decay into their lowest-energy, or ground, state."
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