Antihydrogen atoms, on the other hand are poorly understood. Its spectrum has been measured to very high precision. With its single proton and single electron, hydrogen is the most abundant, simple and well-understood atom in the Universe. For example, in astrophysics, analysing the light spectrum of remote stars allows scientists to determine their composition. It helps to characterise atoms and molecules and their internal states. As a result, spectroscopy is a commonly used tool in many areas of physics, astronomy and chemistry. When the electrons move from one orbit to another they absorb or emit light at specific wavelengths, forming the atom's spectrum.
“Using a laser to observe a transition in antihydrogen and comparing it to hydrogen to see if they obey the same laws of physics has always been a key goal of antimatter research, ” said Jeffrey Hangst, Spokesperson of the ALPHA collaboration.Ītoms consist of electrons orbiting a nucleus. It is the result of over 20 years of work by the CERN1 antimatter community. This achievement features technological developments that open up a completely new era in high-precision antimatter research. In a paper published in the journal Nature, the ALPHA collaboration reports the first ever measurement on the optical spectrum of an antimatter atom.
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