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An optical lattice clock based on 87Sr 1S0-3P0 is developed. The width of the spectrum is currently limited to be 1 kHz due to stray magnetic field. The obtained absolute frequency agreed with the CIPM recommendation.
Precision saturation absorption spectroscopy on a vapor cell was performed for 88Sr 1S0 - 3P1 spin-forbidden transition. Various kinds of rare gas were introduced into the cell as buffer gas (BG) and the collision shift due to the BG was detected at ~kHz level. The results and theory to validate the experiment may help to correctly estimate the influence on state-of-the-art lattice clocks whose clock...
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