25 August 2009 Background gas induced collision shift for a Sr spin-forbidden transition
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Buffer gas induced collision shift for the 88Sr 1S0-3P1 transition is investigated by precision saturation spectroscopy of thermal gas in a heat cell. The cell was filled with rare gases of helium, neon, argon, and xenon as buffer gases. Helium showed the largest fractional shift coefficient of 1.6x10-9 Torr-1. The disagreement between our experiments and simple impact calculations indicates effective atom losses from zero-velocity class which contributes to saturated absorption spectroscopy. The result could be useful to evaluate the background gas collision shift of Sr lattice clocks. Keywords: collision, saturated absorption spectroscopy, lattice clock, optical clock, density shift
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Tetsuya Ido, Tetsuya Ido, Nobuyasu Shiga, Nobuyasu Shiga, Ying Li, Ying Li, Hiroyuki Ito, Hiroyuki Ito, Shigeo Nagano, Shigeo Nagano, Atsushi Yamaguchi, Atsushi Yamaguchi, Michi Koide, Michi Koide, Hiroshi Ishijima, Hiroshi Ishijima, Mizuhiko Hosokawa, Mizuhiko Hosokawa, Katarzyna Bielska, Katarzyna Bielska, Roman Ciurylo, Roman Ciurylo, } "Background gas induced collision shift for a Sr spin-forbidden transition", Proc. SPIE 7431, Time and Frequency Metrology II, 74310F (25 August 2009); doi: 10.1117/12.825471; https://doi.org/10.1117/12.825471

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