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Partly subjected to the stability of optical frequency source, the magnetic dipole and electric quadrupole hyperfine constants of the 85Rb 6P3/2 State have been reported to be 8.163(4) MHz and 8.191(27) MHz, respectively. To pursue the higher precision, here we have constructed two more robust 85Rb spectrometers with a preliminary stability of 2.3×10−13/√τ based on the modulation transfer spectroscopy...
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