Mainz 2026 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 25: Precision Spectroscopy of Atoms and Ions II (joint session A/Q)
Q 25.2: Talk
Tuesday, March 3, 2026, 11:30–11:45, N 3
Doppler-free two-photon spectroscopy of xenon — •Björn-Benny Bauer2,1, Felix Waldherr1, Thorsten Groh1, Skyler Degenkolb2, and Simon Stellmer1 — 1University Bonn, Germany — 2University Heidelberg, Germany
High-precision spectroscopy of xenon is essential for a range of applications, including electric dipole moment (EDM) searches and isotope-shift studies, but suitable high-power deep-UV laser sources remain difficult to access. Here, we present high-resolution, Doppler-free two-photon spectroscopy of xenon using fluorescence detection. From these measurements, we determine the isotope shifts and extract the hyperfine structure parameters of the targeted transition. We further perform a King-plot analysis incorporating electronically similar transitions. The results exhibit clear linearity among the bosonic isotopes, while pronounced non-linearities arise when fermionic isotopes are included.
Keywords: Isotope shift; Deep-UV; King-plot