Hyperfine coupling constants of cesium 7D states using two-photon spectroscopy

摘要

Doppler-free two-photon transitions of cesium 6S_(1/2) → 7D_(3/2,5/2) were observed in a thermal stabilized cell. A repeated spectrum of 75 MHz introduced from the side band of an electro-optical modulator served as a frequency marker to improve the accuracy of frequency measurement. The hyperfine magnetic dipole constant A and electrical quadrupole constant B of Cs 7D_(3/2, 5/2) can be derived from the splitting intervals of the observed spectra. The results are: A = 7.36(07) MHz, B = -0.88(87) MHz for the 7D_(3/2)state, and A = -1.81(05) MHz, B = 1.01(1.06) MHz for the 7D_(5/2) state. These coefficients are improvements for testing high-precision measurements and determining fundamental physical constants.