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  • 31.20.Tz  (1)
  • 32.70  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 13 (1989), S. 107-113 
    ISSN: 1434-6079
    Keywords: 32.60.S ; 32.70 ; 32.20.J ; 32.80.B
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In a CW laser experiment on bound Rydberg states of barium electric-field-induced level crossings were studied. A regular type of avoided crossing of 6snf 3 F 2 and 6s (n+4)s 3 S 1 levels (n≈60,M=0) was observed under circumstances where the minimum separation was larger than the linewidth involved. This type of crossing could be reproduced using a diagonalisation procedure of the total energy matrix in the presence of the field. However, in the case of avoided crossings of the 6snf 3 F 2 and 6s(n+4)p 1 P 1 sublevels, where the minimum separation was smaller than the linewidth of the3 F 2 level, an interference-like profile was recorded. An important feature in the explanation of this interference-like profile turned out to be the broadening of the3 F 2 level by small field inhomogeneities.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 8 (1988), S. 149-161 
    ISSN: 1434-6079
    Keywords: 31.60.+b ; 31.30.Gs ; 31.20.Tz ; 32.70.Cs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract High resolution laser-atomic-beam spectroscopy has been applied to study the hyperfine structure of the barium 6sng Rydberg series forn=6−40. The singlet-triplet mixing of the two 6sng J=4 series is deduced through a diagonalisation of the total Hamiltonian. Multichannel Quantum Defect Theory (MQDT) has been used to reproduce both experimental level energies of the 6sng J=3,4 and 5 series and the extracted singlet-triplet mixing. The close-coupling channels of the 6sng Rydberg series turn out to be nearly purejj-coupled channels in contradistinction to lowerl Rydberg series. Furthermore MQDT is used to analyse the observed isotope shifts and peak intensities of the 6sng Rydberg series.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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