Precision measurement of the hyperfine structure of the 133Cs 6P 3/2 state (original) (raw)
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Comptes Rendus Physique, 2004
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Hyperfine spectroscopy on the 6 P 3/2 state of 133 Cs using coherent control
Europhysics Letters (EPL), 2005
We show that coherent-control techniques are uniquely suited for high-resolution hyperfine spectroscopy. We apply this method to a V-type system in the D2 line of 133 Cs The spectrum of a weak probe beam shows Doppler-free transparency peaks when the strong control beam is resonant with a neighboring hyperfine transition. The lineshape and linewidth are consistent with theoretical calculations. Using an acousto-optic modulator to calibrate the frequency of the control beam, we measure hyperfine intervals in the 6P 3/2 state with an accuracy of 6 kHz. The measurement is important because there is a large discrepancy between two earlier measurements on this state.
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We have calculated relativistic energies, weighted oscillator strengths and transition probabilities for electric dipole (E1) transitions among the terms belonging to 1snl (np9, lp3) configurations in helium-like sulphur. The calculations are based upon the multiconfiguration Hartree-Fock method within the framework of Breit-Pauli relativistic corrections. Our calculated values are also compared with other experimental and theoretical results. r the wavelengths and relative intensities of the intercombination lines 3 3 P 1 -1 1 S 0 in the spectra of laserproduced plasma. Lin et al. calculated oscillator strengths for the transitions m 3,1 S 0,1 -n 3,1 P 1 (3pm, np5). Mewe and Schrijver [16] evaluated line intensities of all lines for helium-like ions. Drake presented frequencies and transition rates in some helium-like ions. Berry et al. analyzed wavelengths and fine structure of 2s-2p transition in two-electron ions and compared them with theory and experiments. The wavelengths of 2 3 S-2 3 P transitions in S XV were measured by Livingston et al. . Precision wavelength measurements for 2 3 S 1 -2 3 P 0,2 transitions and 2 1 P 1 -1 1 S 0 and 2 3 P 1 -1 1 S 0 transition in helium-like sulphur were presented by DeSerio et al. [20] and Schleinkofer et al. . Energy levels for 1snl (n ¼ 2-5) states were calculated the perturbation method by power series in 1/Z and aZ by Vainshtein and Safronova . A theoretical study of two-photon emission rates for the 2 1 S state and n ¼ 1 and 2 states were presented by Drake . A comparison between calculated and measured wavelengths of resonance transitions were reported by Aglitsky et al. . The energies of the n ¼ 2 triplet states in helium-like ions were calculated with relativistic many-body perturbation theory by Johnson and Sapirstein [26]. Berry et al. [27] made a careful comparison of the triplet state energies. The results for relativistic configuration-interaction calculations of n ¼ 2 triplet states of helium-like ions were presented by Chen et al. [28]. Relativistic many-body calculations of n ¼ 1 and 2 states were observed by Plante et al. [29]. The list of wavelengths, oscillator strengths and statistical weights for spectral lines arising from the ground state were presented by Verner et al. [30]. Howie et al. [31] measured the wavelengths using photographic spectroscopy of beam foil n ¼ 2 triplet states. Kato et al. [32] reported theoretical atomic data of satellite spectra for helium-like sulphur with different methods. Two-photon decay rates of metastable 2 1 S 0 and 2 3 S 1 states were presented for helium-like ions in the Z ¼ 2-100 range by Derevianko and Johnson [33]. Safronova and Johnson [34] studied energy levels and autoionizing rates of some levels for helium-like with Z ¼ 4-54 ions. Kimura et al. [35] calculated rate coefficients for electron impulse excitation of helium-like ions with the Dirac R-matrix approach. Kingston et al. [36] obtained spontaneous transition rates for E1, M1, E2 and M2 transitions using fully relativistic GRASP and CIV3 codes.
Hyperfine structure and absolute frequency of the ^87Rb 5P_3/2 state
Optics Letters, 1996
We have constructed two highly stable and reproducible 87 Rb D 2-saturated-absorption spectrometers at 780 nm, using dither/third-harmonic lock-in detection and radio-frequency sideband techniques, respectively. We achieved 63-kHz reproducibility and agreement between these two independent systems. Heterodyne measurements of the hyperfine splittings of the 5P 3/2 state give its magnetic dipole ͑A͒ and electric quadrupole ͑B͒ hyperfine constants with a 10-fold reduction in uncertainty.