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Displaying records 21 to 28.
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21. Ratio of the Al^u+^ and Hg^u+^ Optical Clock Frequencies to 17 Decimal Places
Topic: Atomic Physics
Published: 8/25/2008
Authors: Wayne M Itano, Till P Rosenband, David Hume, P.O. Schmidt, Chin W. Chou, A. Brusch, Luca Lorini, Windell Oskay, Robert Eugene Drullinger, Sarah Bickman, Tara Michele Fortier, Jason Stalnaker, Scott A Diddams, William C Swann, Nathan Reynolds Newbury, David J Wineland, James C Bergquist
Abstract: Frequency standards (atomic clocks) based on narrow optical transitions in ^u27^Al^u+^ and ^u199^Hg^u+^ have been developed over the past several years at NIST. These two types of standards are both based on single ions confined in Paul traps, but di ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842568

22. Realization of a single and closed Lambda-system in a room-temperature three-level coherently prepared resonant medium with narrow D 1 hyperfine splittings
Topic: Atomic Physics
Published: 7/9/2009
Authors: Ke Li, Lu Deng, M G Payne
Abstract: A single, closed three-state Ë-system using a parallel-polarization, co-propagating beam configuration in rubidium is investigated experimentally for efficient group velocity reduction at room temperature using electromagnetically induced transp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902124

23. Spectrum and Energy Levels of Five-Times Ionized Zirconium (Zr VI)
Topic: Atomic Physics
Published: 1/5/2016
Authors: Joseph Reader, Mark D. Lindsay
Abstract: The spectrum of five-times-ionized zirconium Zr VI was observed from 160 Å to 2000 Å with sliding spark discharges on 10.7-m normal- and grazing-incidence spectrographs. The existing analysis of this spectrum [Khan Z. A. et al. 1985 Phys. Scr. 31 83 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=918722

24. Stimulated Generation of Superluminal Light Pulses via Four-wave Mixing
Topic: Atomic Physics
Published: 4/26/2012
Authors: Ryan Thomas Glasser, Ulrich Vogl, Paul D Lett
Abstract: We report on the four-wave mixing of superluminal pulses, in which both the injected and generated pulses involved in the process propagate with negative group velocities. Generated pulses with negative group velocities of up to vg = −c/880 ar ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910231

25. Trapping atoms using nanoscale quantum vacuum forces
Topic: Atomic Physics
Published: 7/10/2014
Authors: Jacob M Taylor, Darrick E. Chang, Kanupriya Sinha, H J Kimble
Abstract: Quantum vacuum forces dictate the interaction between individual atoms and dielectric surfaces at nanoscale distances. For example, their large strengths typically overwhelm externally applied forces, which makes it challenging to controllably interf ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915029

26. Ultraviolet single-photons on demand and entanglement of photons with a large frequency difference
Topic: Atomic Physics
Published: 12/20/2004
Authors: Lu Deng, Edward W Hagley, M. G. Payne, Ying Wu
Abstract: We investigate an efficient scheme for generating ultraviolet single-photons s,300 nmd. The scheme combines the highly efficient single-photon four-wave mixing scheme and fast developing quantum dot singlephotons on demand source technology. We ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=920377

27. Uncooled, Millimeter-Scale Atomic Magnetometers with Femtotesla Sensitivity
Topic: Atomic Physics
Published: 10/26/2009
Authors: John E Kitching, Svenja A Knappe, William C. Griffith, Jan Preusser, V Gerginov, Peter D. Schwindt, Vishal Shah, Ricardo Jimenez Martinez
Abstract: We summarize recent results at NIST to develop high-performance yet highly miniaturized magnetic sensors based on atomic vapors confined in microfabricated alkali vapor cells. These sensors currently achieve sensitivities in the range of a few tens o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903176

28. Wavelengths, Transition Probabilities, and Energy Levels for the Spectra of Barium (Ba III through Ba LVI)
Topic: Atomic Physics
Published: 11/19/2010
Authors: Jean Ellen Sansonetti, John J Curry
Abstract: Energy levels, with designations and uncertainties, have been compiled for the spectra of barium (Z=56) ions from doubly-ionized to hydrogen-like. Wavelengths with classifications, intensities, and transition probabilities are also tabulated. In addi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904125



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