Mainz 2026 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 25: Precision Spectroscopy of Atoms and Ions II (joint session A/Q)

Q 25.5: Vortrag

Dienstag, 3. März 2026, 12:15–12:30, N 3

Measurement of the hyperfine structure of the 4f¹⁴5d: ²D_5/2 state in trapped ¹⁷³Yb⁺ ions — •Rohan Chakravarthy¹, Jialiang Yu¹, Ikbal A. Biswas¹, Anand Prakash², Clara Zyskind¹, and Tanja E. Mehlstäubler^{1, 2} — ¹PTB, Germany — ²LUH, Germany

We report a measurement of the hyperfine structure of the 4f¹⁴5d: ²D_5/2 state in ¹⁷³Yb⁺ using the 4f¹⁴6s: ²S_1/2 → 4f¹⁴5d: ²D_5/2 electric quadrupole (E2) transition at 411 nm in trapped ¹⁷³Yb⁺ ions and the resolution of the higher order hyperfine structure C coefficient. The measurement involves coherent excitation of the atom with an ultrastable laser to the excited hyperfine states and the measurement of the absolute frequency of the transitions with a frequency comb referenced to an ultrastable silicon cavity and a hydrogen maser. This measurement, along with the planned measurement of the hyperfine structure of the 4f¹³6s²: ²F_7/2 state will lead to the resolution of the higher order nuclear moments predicted in Yb.

Keywords: Precision spectroscopy; Trapped ions; Ytterbium; Nuclear Moments; Atomic Clocks