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Träfflista för sökning "L773:1050 2947 OR L773:1094 1622 srt2:(1985-1989)"

Sökning: L773:1050 2947 OR L773:1094 1622 > (1985-1989)

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1.
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3.
  • Mannervik, S, et al. (författare)
  • 1s2s2p2 5p3 5S transition in B ii
  • 1987
  • Ingår i: Physical Review A (Atomic, Molecular and Optical Physics). - 1050-2947. ; 35:7, s. 3136-3138
  • Tidskriftsartikel (refereegranskat)
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4.
  • Reistad, N., et al. (författare)
  • Accurate transition probabilities in ions obtained by isoelectronic smoothing of line strengths
  • 1986
  • Ingår i: Physical Review A. - 1050-2947. ; 34:4, s. 2632-2637
  • Tidskriftsartikel (refereegranskat)abstract
    • Lifetime measurements, based on the method of beam-foil spectroscopy, together with careful corrections for cascade effects, have in recent years yielded the line strength of the 2s2 1S-2s2p 1P°transition in Be-like ions with uncertainties ranging from 3.4% to 8.1% in Bei-O. By applying a method of isoelectronic smoothing of line strengths, similar to those earlier used for excitation energies and transition wavelengths, we have reduced the experimental uncertainties by about a factor of 2, to 1.9-3.6 % for these transitions. The fitted results are in excellent agreement with the best theoretical data. The applicability of this method to other isoelectronic sequences is briefly discussed.
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5.
  • Reistad, N., et al. (författare)
  • Lifetimes of low-lying doublet states in S IV
  • 1989
  • Ingår i: Physical Review A. - 1050-2947. ; 39:9, s. 4518-4524
  • Tidskriftsartikel (refereegranskat)abstract
    • Intensity decays of the 3s3p2 S2,2P,2D, 3p3 P2,2D, 3s3p(3P)3d D2, 3s3p(1P)3d F2, 3s23d D2, 4s S2, 4p P2, 5p P2, 4d2D, and 4f 2F states in S S IV have been recorded using the beam-foil technique. The arbitrarily normalized decay curves method for cascade corrections has been applied to obtain accurate lifetimes for 11 of the 18 levels studied. Theoretical lifetimes for these levels, obtained in a superposition-of-configurations calculation, are also reported, and several interesting examples of both long- and short-range interactions are discussed.
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