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  • 1
    Electronic Resource
    Electronic Resource
    Concentration of lithium vapor in a high-temperature sapphire capillary based on light-induced drift (1998)
    Springer
    Journal of experimental and theoretical physics 87 (1998), S. 634-638 
    Details
    ISSN: 1090-6509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The accumulation of atomic lithium vapor in a sapphire capillary based on light-induced drift is experimentally investigated. To suppress lithium adsorption on the walls of the capillary and prolong the life of the atomic state, the capillary was heated to high temperatures. The phenomenon of an “optical piston” was observed, indicating a high degree of concentration of atomic lithium vapor. The experimental results are consistent with theoretical ideas, and they suggest that heated cells hold some promise for efficient isotope separation and the detection of atomic micro-impurities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.558704
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  • 2
    Electronic Resource
    Electronic Resource
    Anomalies in resonant absorption line profiles of atoms with large hyperfine splitting (1997)
    Springer
    Journal of experimental and theoretical physics 84 (1997), S. 51-58 
    Details
    ISSN: 1090-6509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We examine a monochromatic absorption line in the velocity-nonselective excitation of atoms when the components of the hyperfine stricture of the electronic ground states are optically pumped. We show that the absorption lines possess unusual substructures for some values of the hyperfine splitting of the ground state (which exceed the Doppler absorption linewidth severalfold). These substructures in the absorption spectrum are most apparent if the hyperfine structure of the excited electronic state is taken into account. We calculate the absorption spectra of monochromatic light near the D 1 and D 2 lines of atomic rubidium 85,87Rb. With real hyperfine splitting taken into account, the D 1 and D 2 lines are modeled by 4-and 6-level diagrams, respectively. Finally, we show that atomic rubidium vapor can be successfully used to observe the spectral features experimentally.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.558151
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Acid-base properties and complex-forming ability of 4,6-dimethyl-2-(1H)-pyrimidinone (thione) (1994)
    Springer
    Russian chemical bulletin 43 (1994), S. 799-802 
    Details
    ISSN: 1573-9171
    Keywords: 4,6-dimethyl-2-(1H)-pyrimidinone, 4,6-dimethyl-2-(1H)-pyrimidinethione, dysprosium tris(acethylacetonate), complex formation ; stability constants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Complex formation of 4,6-dimethyl-2-(1H)-pyrimidinone (thione) with dysprosium(III) tris(acetylacetonate), Dy(acac)3, in 80% (v/v) aqueous methanol was investigated by pH-metric titration and paramagnetic birefringence. Due to its higher basicity and lower acidity, 4,6-dimethyl-2-(1H)-pyrimidinone is coordinated by Dy(acac)3 without deprotonation, whereas its thio analog is coordinated in the deprotonated form. Due to the higher acidity of 4,6-dimethyl-2-(1H)-pyrimidinethione, the complex of its anion with Dy(acac)3 is much more stable than that derived from the oxo analog, as inferred from the comparison of the stability constants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00717340
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  • 4
    Electronic Resource
    Electronic Resource
    Sodium MOT collection efficiency as a function of the trapping and repumping laser frequencies and intensities (2001)
    Springer
    The European physical journal 13 (2001), S. 71-82 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 32.80.Pj Optical cooling of atoms; trapping - 42.50.Vk Mechanical effects of light on atoms, molecules, electrons, and ions - 32.60.+i Zeeman and Stark effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: A detailed theoretical and experimental description of a sodium MOT as a function of the pumping and repumping laser frequencies and intensities is given. The effective trapping schemes and the collection efficiency have been experimentally measured and calculated by solving an original 3D model. This model considers the whole bunch of the 32 ground and excited (P1/2 + P3/2) Zeeman sublevels, the actual trap geometry, the magnetic field intensity and direction, the light polarization, and evaluates both the velocity capture range and the number of trapped particles N. Synergetic and competition mechanisms due to the trapping and repumping lasers have been predicted and experimentally observed. The model simulation has been compared with the results reported in the literature and with those obtained by us and a quite good agreement has been found. The model can be easily adapted to the other sodium isotopes as well as to all the other alkalis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100530170289
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    Paper (German National Licenses)
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