Boyd Martin M, Ludlow Andrew D, Blatt Sebastian, Foreman Seth M, Ido Tetsuya, Zelevinsky Tanya, Ye Jun
JILA, National Institute of Standards and Technology and Department of Physics, University of Colorado, Boulder, CO 80309-0440, USA.
Phys Rev Lett. 2007 Feb 23;98(8):083002. doi: 10.1103/PhysRevLett.98.083002. Epub 2007 Feb 21.
Aided by ultrahigh resolution spectroscopy, the overall systematic uncertainty of the 1S0-3P0 clock resonance for lattice-confined 87Sr has been characterized to 9 x 10(-16). This uncertainty is at a level similar to the Cs-fountain primary standard, while the potential stability for the lattice clocks exceeds that of Cs. The absolute frequency of the clock transition has been measured to be 429 228 004 229 874.0(1.1) Hz, where the 2.5 x 10(-15) fractional uncertainty represents the most accurate measurement of a neutral-atom-based optical transition frequency to date.
在超高分辨率光谱学的辅助下，晶格囚禁的87Sr的1S0 - 3P0时钟共振的整体系统不确定性已被表征为9×10^(-16)。该不确定性与铯喷泉基准处于相似水平，而晶格时钟的潜在稳定性超过了铯时钟。时钟跃迁的绝对频率已被测量为429228004229874.0(1.1)Hz，其中2.5×10^(-15)的分数不确定性代表了迄今为止基于中性原子的光跃迁频率的最精确测量。
