论文标题
Cesium $ 7D_ {5/2} $状态的超精细耦合常数为Octupole术语
Hyperfine coupling constants of the cesium $7D_{5/2}$ state measured up to the octupole term
论文作者
论文摘要
我们通过使用Acousto-Optic调制器的精确频率扫描来启用高分辨率的$^{133} $ cs中的超精细分割的测量。所有六个超细水平都在我们的光谱中解决。我们确定a = -1.70867（62）MHz和b = 0.050（14）MHz的超精细耦合常数，在A和B的精确度上代表了20倍的改善。此外，我们的测量足够精确，足以使磁性八杆耦合常数C = 0.4（1.4（1.4（1.4）khz $ noutial contection contection coply的界限。我们还报告了AC Stark Shift的测量[-46 $ \ pm $ 4 Hz/（w/cm $^2 $）]，碰撞转移和压力扩大，这对于基于$ 6S_ {1/2} \ rightArrow 7D_ {5/2} $ tix-ty-photton Trivention的光学频率标准很重要。
We report the measurement of the hyperfine splitting in the $7D_{5/2}$ state of $^{133}$Cs using high resolution Doppler-free two-photon spectroscopy enabled by precise frequency scans using an acousto-optic modulator. All the six hyperfine levels are resolved in our spectra. We determine the hyperfine coupling constants A = -1.70867(62) MHz and B = 0.050(14) MHz which represent over 20-times improvement in the precision of both A and B. Moreover, our measurement is sufficiently precise to put bounds on the value of the magnetic octupole coupling constant C = 0.4(1.4) kHz for the $7D_{5/2}$ state. We additionally report the measurement of ac Stark shift [-46 $\pm$ 4 Hz/(W/cm$^2$)], collisional shift and pressure broadening which are important for optical frequency standards based on the $6S_{1/2} \rightarrow 7D_{5/2}$ two-photon transition.
