An international research team led by the Paul Scherrer Institute PSI has measured the radius of the nucleus of muonic helium-3 with unprecedented precision. The results are an important stress test ...

Photoionization, the process by which an incident photon ejects an electron from an atom, lies at the heart of many atomic physics studies. Coupled with cross section measurements – which quantify the ...

Dielectronic recombination (DR) is a vital electron–ion interaction in which a free electron is captured by an ion, simultaneously exciting a bound electron and generating a doubly excited state. This ...