Abstract
Buffer gas induced collision shift for 88Sr1S0−3 P1 transition is investigated by precision saturation spectroscopy of thermal gas in a heat cell. The cell was filled with rare gas of helium, neon, argon, and xenon as buffer gasees. Helium showed the largest fractional shift coefficient of 1.6 × 10−9 Torr−1. The result could be useful to evaluate the background gas collision shift of Sr lattice clocks.
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