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Internal structure of antihydrogen probed for the first time

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Geplaatst op 08 maart 2012 - 15:12

Internal structure of antihydrogen probed for the first time

The first spectroscopy measurements of an atom of antimatter have been made by an international team of physicists working on the ALPHA experiment at CERN. The work is an important step towards understanding why the universe contains more matter than antimatter.

Antihydrogen an atomic bound state of a positron and antiproton was first produced at CERN towards the end of 1995. Over the past two years, physicists working on the ALPHA experiment have advanced our understanding of antimatter by becoming the first to capture and store anti-atoms for long enough to examine them in detail. The researchers trapped a total of 38 antihydrogen atoms for about one-fifth of a second in 2009 and then perfected their apparatus and technique to trap a total of 309 antihydrogen atoms for 1000 s in 2010. Now, the same team is the first to show that it is possible to probe the internal structure of an antihydrogen atom, reporting the first tentative measurement of the antihydrogen spectrum. Analysing the spectra of antimatter is essential to understand its structure and determine exactly how it differs from ordinary matter.


Lees verder: http://physicsworld....icle/news/48871

Bron: IOP Physics world

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