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  • Articles: DFG German National Licenses  (5)
  • 2020-2024
  • 2000-2004  (5)
  • 1935-1939
  • 1920-1924
  • 1905-1909
  • 1890-1899
  • 1870-1879
  • 1820-1829
  • 2002  (1)
  • 2001  (4)
  • 1938
  • 1825
  • PACS. 32.80.Pj Optical cooling of atoms; trapping – 34.50.Rk Laser-modified scattering and reactions  (3)
  • PACS. 03.65.Ge Solutions of wave equations: bound states  (2)
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  • Articles: DFG German National Licenses  (5)
Material
Years
  • 2020-2024
  • 2000-2004  (5)
  • 1935-1939
  • 1920-1924
  • 1905-1909
    • +
Year
  • 2002  (1)
  • 2001  (4)
  • 1938
  • 1825
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Improvement of numerical integration algorithms by means of coordinate transformations (2002)
    Springer
    The European physical journal 21 (2002), S. 19-24 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 03.65.Ge Solutions of wave equations: bound states
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We study the effect of coordinate transformations on numerical integration algorithms and the Richardson extrapolation. Present method is based on Hermitian transformed eigenvalue equations and symmetrical tridiagonal matrices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjd/e2002-00186-y
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 2
    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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  • 3
    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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  • 4
    Electronic Resource
    Electronic Resource
    Generation of exact analytic bound state solutions from solvable non-powerlaw potentials by a transformation method (2001)
    Springer
    The European physical journal 17 (2001), S. 5-11 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 03.65.Ge Solutions of wave equations: bound states
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: A transformation method has been applied to the exactly solvable Hulthen problem to generate a hierarchy of exactly solved quantum systems in any chosen dimension. The generated quantum systems are, in general, energy-dependent with a single normalized eigenfunction, as the Hulthen potential is a non-powerlaw potential. A method has been devised to convert a subset of the generated quantum systems with energy-dependent potentials to a single normal system with an energy-independent potential that behaves like a potential qualitatively similar to the Poschl-Teller potential. A second-order application of the transformation method on the Hulthen system produces another Sturmian quantum system and a different method is given to regroup them into a normal quantum system which resembles the Morse potential. Existence of normalizable eigenfunctions for these systems are found to be dependent on the local and asymptotic behaviour of the transformation function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100530170032
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    Paper (German National Licenses)
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  • 5
    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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