News 28 Jan 2021 | Source: Johannes Gutenberg University Mainz
Publication in Nature is the result of 20 years of proven collaboration
Joint press release of Johannes Gutenberg University Mainz and Paul Scherrer Institute PSI
In experiments at the Paul Scherrer Institute PSI, an international research collaboration has measured the radius of the atomic nucleus of helium five times more precisely than ever before. With the aid of the new value, fundamental physical theories can be tested and natural constants can be determined even more precisely. For their measurements, the researchers needed muons – these particles are similar to electrons but are around 200 times heavier. PSI is the only research site in the world where enough so-called low-energy muons are produced for such experiments. Their results were published in the journal