Absolute frequency measurement of the 87Sr optical lattice clock at NTSC
  using International Atomic Time

Lu, Xiaotong; Guo, Feng; Wang, Yebing; Xu, Qinfang; Zhou, Chihua; Xia, Jingjing; Wu, Wenjun; Chang, Hong

doi:10.48550/arXiv.2211.04096

arXiv.svg (5.58 kB)

Absolute frequency measurement of the 87Sr optical lattice clock at NTSC using International Atomic Time

preprint

posted on 2023-01-10, 03:14 authored by Xiaotong Lu, Feng Guo, Yebing Wang, Qinfang Xu, Chihua Zhou, Jingjing Xia, Wenjun Wu, Hong Chang

We report the absolute frequency measurement of the 5s2 1S0-5s5p 3P0 transition in 87Sr optical lattice clock (Sr1) at National Time Service Center (NTSC). Its systematic frequency shifts are evaluated carefully with a total relative uncertainty of 5.1E10-17. The measured absolute frequency is 429 228 004 229 872.91(18) Hz with a relative uncertainty of 4.13E10-16, with reference to the ensemble of primary and secondary frequency standards published in the Circular T bulletin by BIPM through a global navigation satellite system (GNSS) link.