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  • 32.70.Cs  (1)
  • 32.80.Bx  (1)
  • 35.10.F  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Radiative lifetimes of levels of the configuration 4f 7 (8 S) 6s 6p in Eu I (1987)
    Springer
    The European physical journal 6 (1987), S. 31-34 
    Details
    ISSN: 1434-6079
    Keywords: 32.70.Cs ; 32.70.Fw
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Radiative lifetimes of the 4f 7 (8 S) 6s 6p z 10 P 7/2, 9/2,z 8 P 5/2, 7/2, 9/2 andz 6 P 7/2, 5/2 levels of Eu I were measured by the time resolved recording of the exponential decay of the fluorescence. Three of them were measured for the first time, the others agree with previous determinations. From the values of the lifetimes absolute oscillator strengths are deduced, taking into account the branching ratios for the transitions to the 4f 7 6s 2 and 4f 7 5d 6s levels. From these absolutef values the radial integralI(6s 2, 6s 6p) was derived by a parametric analysis. Theoretical values of oscillator strengths which were calculated using this radial integral show good agreement with the experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01436994
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    J and term dependences in the isotope shift of Eu I (1986)
    Springer
    The European physical journal 1 (1986), S. 55-64 
    Details
    ISSN: 1434-6079
    Keywords: 32.20.J ; 35.10.F
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract High-resolution laser atomic beam spectroscopy has been applied to studyJ and term dependences in the isotope shift of the levels 4f 75d6s a 10 D J ,a 8 D J of Eu I. A parametric analysis of the isotope shift has been performed. TheJ dependence is interpreted through two term-dependent parametersz 5d , and the term dependence through one parameterΔT:z 5d (a 10 D)=44.1 (2.6) MHz,z 5d (a 8 D)=55.9 (2.3) MHz,ΔT=408.5 (3.2) MHz. Ab initio Hartree-Fock and Dirac-Fock calculations have been made to interpret these parameters. Within the accuracy of the calculations the parameters can be attributed to field shift effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01384659
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Stark effect study of the 4f66s2 7 F 1, 2, 3, 4, 5, 6 levels of samarium using nonlinear level crossing technique (1991)
    Springer
    The European physical journal 18 (1991), S. 101-105 
    Details
    ISSN: 1434-6079
    Keywords: 32.60.+i ; 32.80.Bx
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The nonlinear level crossing technique with parallel electric and magnetic fields was used to investigate the Stark effect of six levels of the ground multiplet 4f66s2 7 F in the Sm I-spectrum. The tensor polarizabilities were deduced from the level crossing signals. The variation of the tensor polarizabilities of the levels of the ground multiplet is well reproduced by the LS coupling approximation, which gives an average value of α2(F)=−0.88(6) kHz/(kV/cm)2 for the six measured levels. The experimental results confirm the validity of the central field approximation in the ground configuration of Sm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01418174
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    Paper (German National Licenses)
    Fulltext
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