Time-resolved quantum beats in the fluorescence of helium resonantly excited by XUV radiation
arXiv:2112.08508 · doi:10.1088/1361-6455/abc660
Abstract
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 a systematic study of this effect and discuss the possibilities of studying this phenomenon in the XUV and x-ray regime.
7 pages, 4 figures