Helium nucleus measured with record precision

Wilfried Nörtershäuser ()

Nature, 2021, vol. 589, issue 7843, 518-519

Abstract: The size of the helium nucleus has been determined using exotic helium atoms in which one electron has been replaced with its heavier cousin, a muon. The result sheds light on a decade-old puzzle regarding the proton radius.

Keywords: Nuclear physics; Atomic and molecular physics (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1038/d41586-021-00120-0

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