Time-resolved quantum beats in the fluorescence of helium resonantly excited by XUV radiation
Time-resolved quantum beats in the fluorescence of helium resonantly excited by XUV radiation
We report on the observation of time-resolved quantum beats in the helium fluorescence from the transition 1s3p -> 1s2s, where the initial state is excited by XUV free-electron laser radiation. The quantum beats originate from the Zeeman splitting of the magnetic substates due to an external magnetic field. We perform …