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  • Articles: DFG German National Licenses  (6)
  • 2020-2024
  • 2000-2004  (6)
  • 1950-1954
  • 1935-1939
  • 1920-1924
  • 1905-1909
  • 1870-1879
  • 1820-1829
  • 2023
  • 2003  (2)
  • 2001  (4)
  • 1935
  • 1908
  • 1820
  • PACS. 32.70.Cs Oscillator strengths, lifetimes, transition moments  (3)
  • PACS. 32.80.Pj Optical cooling of atoms; trapping – 34.50.Rk Laser-modified scattering and reactions  (3)
Source
  • Articles: DFG German National Licenses  (6)
Material
Years
  • 2020-2024
  • 2000-2004  (6)
  • 1950-1954
  • 1935-1939
  • 1920-1924
    • +
Year
  • 2023
  • 2003  (2)
  • 2001  (4)
  • 1935
  • 1908
    • +
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Lifetime measurements of some levels belonging to the 3p 5nd ( , 5, 6, 7) configuration of ArI (2003)
    Springer
    The European physical journal 23 (2003), S. 229-231 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 32.70.Cs Oscillator strengths, lifetimes, transition moments
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Lifetimes of some 3p5nd (n = 4, 5, 6, 7) levels of neutral argon have been measured by high frequency deflection technique with a delayed coincidence single photon counting arrangement. The measurements have been performed under conditions where pressure dependent effects are negligible. Lifetimes of some of the levels have been measured for the first time. The results have been compared with other experimental and theoretical values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjd/e2003-00078-8
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Theoretical transition probabilities and lifetimes in nickel-like Se , Y and Sn ions (2003)
    Springer
    The European physical journal 23 (2003), S. 5-13 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 32.70.Cs Oscillator strengths, lifetimes, transition moments
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: The 17 levels of the 3 d 10 , 3 d 9 4 s and 3 d 9 4 p configurations, and the electric-dipole transitions among these levels are calculated for the three nickel-like ions Se6+, Y11+ and Sn22+ by using large-scale multiconfiguration Dirac-Fock wavefunctions. From these computations, the excitation energies and transition probabilities as well as the lifetimes of 3 d 9 4 p levels are derived, including all dominant effects of relativity, correlation and of the rearrangement of the electron density within the same framework. Comparison is made with the scarce number of experimental data and previous semi-empirical computations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjd/e2003-00008-x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Radiative lifetimes of 7d, 8d 1D2 excited states of Hg I (2001)
    Springer
    The European physical journal 13 (2001), S. 159-163 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 32.70.Cs Oscillator strengths, lifetimes, transition moments
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Radiative lifetimes of 7d, 8d 1 D 2 excited states of Hg I are measured using pulsed two-photon excitation from the ground [Xe]5d 106s 2 1 S 0 mercury state, detecting the decay of the laser-induced fluorescence. The results are compared with theoretical values, obtained by means of a Hartree-Fock single configuration method, taking into account electron configuration interaction. The radiative lifetime value dependence on the effective principal quantum number for the nd 1 D 2 series is analyzed and compared with the quantum defect dependence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100530170262
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Inversion analysis of K 2 coupled electronic states with the Fourier grid method (2001)
    Springer
    The European physical journal 17 (2001), S. 319-328 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 32.80.Pj Optical cooling of atoms; trapping – 34.50.Rk Laser-modified scattering and reactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We present a new determination of the potential curves and interactions of the coupled electronic states A 1 Σ + u and b 3 Π u of the potassium dimer, based on new laser spectroscopy measurements within a molecular beam, combined with data available in the literature. We used a new global deperturbation approach, involving the Fourier Grid Hamiltonian method for energy level calculation. A standard deviation of 1.2 is obtained corresponding to a variance of 7.5×10 -3 cm-1, representing a significant improvement compared to the standard deviation of 4 yielded by the traditional local deperturbation approach.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100530170006
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Cold rubidium molecule formation through photoassociation: A spectroscopic study of the 0 g - long-range state of 87 Rb 2 (2001)
    Springer
    The European physical journal 15 (2001), S. 189-198 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 32.80.Pj Optical cooling of atoms; trapping – 34.50.Rk Laser-modified scattering and reactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We report the detailed analysis of translationally cold rubidium molecule formation through photoassociation. Cold molecules are formed after spontaneous decay of photoexcited molecules from a laser cooled atomic sample, and are detected by selective mass spectroscopy after two-photon ionization into Rb 2 + ions. A spectroscopic study of the 0 g - (5 S + 5 P 3/2 ) pure long-range state of 87Rb2 is performed by detecting the ion yield as a function of the photoassociation laser frequency; the spectral data are theoretically analyzed within the semiclassical RKR approach. Molecular ionization is resonantly enhanced through either the 2 3 Π g or the 2 3 Σ + g intermediate molecular states. Some vibrational levels of the latter electronic state are observed and assigned here for the first time. Finally, cold molecules formation rates are calculated and compared to the experimentally measured ones, and the vibrational distribution of the formed molecules in the a 3 Σ + u ground triplet state is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100530170165
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Penning collisions of laser-cooled metastable helium atoms (2001)
    Springer
    The European physical journal 14 (2001), S. 15-22 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 32.80.Pj Optical cooling of atoms; trapping – 34.50.Rk Laser-modified scattering and reactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We present experimental results on the two-body loss rates in a magneto-optical trap of metastable helium atoms. Absolute rates are measured in a systematic way for several laser detunings ranging from -5 to -30 MHz and at different intensities, by monitoring the decay of the trap fluorescence. The dependence of the two-body loss rate coefficient β on the excited state ( 23 P 2) and metastable state ( 23 S 1) populations is also investigated. From these results we infer a rather uniform rate constant K sp = (1±0.4)×10-7 cm3/s.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100530170228
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    Paper (German National Licenses)
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