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...

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Bibliographic Details
Published in:Journal of physics. B, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2020-11, Vol.53 (24), p.244012
Main Authors: LaForge, A C, Benediktovitch, A, Sukharnikov, V, Krušič, Š, Žitnik, M, Debatin, M, Falcone, R W, Asmussen, J D, Mudrich, M, Michiels, R, Stienkemeier, F, Badano, L, Callegari, C, Di Fraia, M, Ferianis, M, Giannessi, L, Plekan, O, Prince, K C, Spezzani, C, Rohringer, N, Berrah, N
Format: Article
Language:English
Subjects:
atomic and molecular physics
fluorescence spectroscopy
free electron lasers
Optics
Physics
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Summary: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.
ISSN:0953-4075
1361-6455
DOI:10.1088/1361-6455/abc660