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arXiv · 1509.03967

Improved frequency measurement of the $^1S_{0}$-$^3P_{0}$ clock transition in $^{87}$Sr using the Cs fountain clock at NMIJ as a transfer oscillator

Takehiko Tanabe·Daisuke Akamatsu·Takumi Kobayashi·Akifumi Takamizawa·Shinya Yanagimachi·Takeshi Ikegami·Tomonari Suzuyama·Hajime Inaba·Sho Okubo·Masami Yasuda·Feng-Lei Hong·Atsushi Onae·Kazumoto Hosaka
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Abstract

We performed an absolute frequency measurement of the $^1S_{0}$-$^3P_{0}$ transition in $^{87}$Sr with a fractional uncertainty of $1.2 \times 10^{-15}$, which is less than one third that of our previous measurement. A caesium fountain atomic clock was used as a transfer oscillator to reduce the uncertainty of the link between a strontium optical lattice clock and the SI second. The absolute value of the transition frequency is 429 228 004 229 873.56(49) Hz.

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Takehiko Tanabe, Daisuke Akamatsu, Takumi Kobayashi, Akifumi Takamizawa, Shinya Yanagimachi, Takeshi Ikegami, Tomonari Suzuyama, Hajime Inaba, Sho Okubo, Masami Yasuda, Feng-Lei Hong, Atsushi Onae, Kazumoto Hosaka. 2015-09-14. Improved frequency measurement of the $^1S_{0}$-$^3P_{0}$ clock transition in $^{87}$Sr using the Cs fountain clock at NMIJ as a transfer oscillator. https://doi.org/10.7566/jpsj.84.115002

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