Isotope-shift spectroscopy of the 1S0 → 3P1 and 1S0 → 3P0 transitions in strontium
Abstract
Isotope shift spectroscopy with narrow optical transitions provides a benchmark for atomic structure calculations and has also been proposed as a way to constrain theories predicting physics beyond the Standard Model. Here, we have measured frequency shifts of the 1S0 → 3P1 and 1S0 → 3P0 transitions between all stable isotopes of strontium relative to 88Sr. This includes the first reported measurements of the 1S0 → 3P0 isotope shift of 88Sr-86Sr and 88Sr-84Sr. Using the isotope shift measurements of the two transitions, a King plot analysis is performed. These results, combined with other recent isotope shift measurements in other atomic systems, will help refine atomic structure calculations and theoretical predictions for new physics.
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