Time-resolved quantum beats in the fluorescence of helium resonantly excited by XUV radiation
AC LaForge, A Benediktovitch, V Sukharnikov, \v{S} Kru\v{s}i\v{c}, M, \v{Z}itnik, M Debatin, RW Falcone, JD Asmussen, M Mudrich, R Michiels, F, Stienkemeier, L Badano, C Callegari, M Di Fraia, M Ferianis, L Giannessi, O, Plekan, KC Prince, C Spezzani, N Rohringer, and N Berrah
TL;DR
This paper reports the observation of time-resolved quantum beats in helium fluorescence excited by XUV radiation, revealing Zeeman splitting effects and exploring potential applications in the XUV and x-ray regimes.
Contribution
It presents the first systematic study of quantum beats in helium fluorescence excited by XUV free-electron laser radiation, highlighting Zeeman splitting effects.
Findings
Observation of quantum beats in helium fluorescence
Zeeman splitting causes the quantum beats
Potential for studying this phenomenon in XUV and x-ray regimes
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.
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