Strontium optical lattice clock at the National Time Service Center

Wang Ye-Bing^{1, 2}, Yin Mo-Juan¹, Ren Jie¹, Xu Qin-Fang¹, Lu Ben-Quan^{1, 2}, Han Jian-Xin^{1, 2}, Guo Yang^{1, 2}, Chang Hong^{1, †}

(a) Resolved Zeeman spectrum of the π transitions. (b) Spin-polarized spectra of the transitions from to and from to .