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A: Fachverband Atomphysik
A 33: Precision Spectroscopy of Atoms and Ions V (joint session A/Q)
A 33.3: Vortrag
Donnerstag, 5. März 2026, 15:00–15:15, N 3
Shelving Spectroscopy of ground state ultraviolet transitions in dysprosium — •Kevin Ng1, Paul Uerlings1, Fiona Hellstern1, Jens Hertkorn1, Luis Weiß1, Stephan Welte1,2, Tilman Pfau1, and Ralf Klemt1 — 15. Physikalisches Institut and Center for Integrated Quantum Science and Technology IQST, Universität Stuttgart — 2CZS Center QPhoton
The open inner-shell electronic structure of lanthanides with large magnetic moments gives rise to a rich spectrum of transitions available for laser cooling, trapping and coherent control of dipolar atoms. Despite this, the large number of ultraviolet (UV) transitions that exist below 400 nm in these atoms have so far been rarely utilized. Here, we investigate multiple ground state UV transitions in dysprosium. Many of these transitions have decay strengths to the ultralong-lived, low-lying first excited state that are comparable to the strongest transitions commonly used in dipolar gas experiments. Using shelving spectroscopy which improves detection sensitivity and provides a straightforward way to distinguish the numerous isotope and hyperfine transitions, we measure isotope shifts, hyperfine coefficients and create King plots to determine their electronic nature. Such knowledge of these UV transitions, which analogously exist in other magnetic atoms is important for optically populating the first excited state and can be used for creating an optical clock, high resolution imaging in quantum gas microscopy and probing lanthanide nuclei with enhanced Schiff moments in searches for physics beyond the standard model.
Keywords: dysprosium; ultraviolet