Spectroscopy of the 1S0-to-1D2 clock transition in 176Lu+
Abstract
High precision spectroscopy of the 1S0-to-1D2 clock transition of 176Lu is reported. Measurements are performed with Hertz level precision with the accuracy of the hyperfine-averaged frequency limited by the calibration of an active hydrogen maser to the SI definition of the second via a GPS link. The measurements also provide accurate determination of the 1D2 hyperfine structure. Hyperfine structure constants associated with the magnetic octupole and electric hexadecapole moments of the nucleus are considered, which includes a derivation of correction terms from third-order perturbation theory.
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