论文标题
$ 6S^2〜^1S_0 \至6S6p〜^3p_1 $ $ f = 3/2 \ f'= 5/2 $ $^{\ text {201}} $ hg过渡及其背景的饱和光谱频谱的绝对频率测量
Absolute frequency measurement of the $6s^2~^1S_0 \to 6s6p~^3P_1$ $F=3/2\to F'=5/2$ $^{\text{201}}$Hg transition with background-free saturation spectroscopy
论文作者
论文摘要
我们报告了一种消除背景引起的系统变化的方法，影响了饱和吸收信号的精确测量。使用此技术，我们测量了$ 6S^2〜^1 \ text {s} _0 \ to 6s6p〜^3 \ text {p} _1 $ text {p} _1 $ transition in $^{201A} \ text {hg text {hg} $（$ f = 3/2 \ f'= 3/2 \'= 5/2 $ $ 11811111）用光学频率梳子同步与UTC局部表示的频率同步。该特定的原子线位于室温下多普勒背景的陡峭坡度上，这导致频率系统移动。我们确定了这种转移对光谱线和测量信号背景的性质的依赖性。
We report the development of a method for eliminating background-induced systematic shifts affecting precise measurements of saturation absorption signals. With this technique, we measured the absolute frequency of the $6s^2~^1\text{S}_0 \to 6s6p~^3\text{P}_1$ transition in $^{201a}\text{Hg}$ ($F=3/2\to F'=5/2$) to be $1181541111051(83)$~kHz. The measurement was referenced with an optical frequency comb synchronized to the frequency of the local representation of the UTC. This specific atomic line is situated on the steep slope of the Doppler background at room temperature, which results in frequency systematic shift. We determined the dependence of this shift on the properties of both the spectral line and the background of the measured signal.
