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J/ApJS/156/105         Transitions in L-shell ions of Fe and Ni      (Gu+, 2005)
Wavelengths of 2l-->3l' transitions in L-shell ions of iron and nickel: a
combined configuration interaction and many-body perturbation theory approach.
    Gu M.F.
   <Astrophys. J. Suppl. Ser., 156, 105-110 (2005)>
   =2005ApJS..156..105G
ADC_Keywords: Atomic physics

Keywords: atomic data - atomic processes


Abstract:
    Using a combined configuration interaction and many-body perturbation
    theory approach, we calculate the level energies of 1s22lq and
    1s22lq-13l' (1≤q≤8) complexes in iron and nickel ions.
    Comparison of 1s22lq energies with experimental results shows that
    the calculation is accurate to within ∼0.15eV for these levels. The
    accuracy of 1s22lq-13l' energies can be slightly worse, at ∼0.5eV.
    The theoretical wavelengths of 2->3 transitions of iron ions are
    compared with the published experimental measurements, and
    discrepancies are found to be mostly within ±10mÅ. Similar
    accuracy is expected for wavelengths of nickel ions. Such accuracy is
    a significant improvement over that obtainable with standard
    configuration interaction methods. A complete table of 2l->3l'
    transition wavelengths of all L-shell ions of iron and nickel is
    presented.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table3.dat        56     1063   Combined CI and MBPT energies of 1s22lq and
                             1s22lq-13l' states for L-shell Fe and Ni ions
table4.dat        35      879   Combined CI and MBPT wavelength of 2l->3l'
                             transitions of L-shell Fe and Ni ions


Byte-by-byte Description of file: table3.dat

   Bytes Format  Units Label   Explanations

   1-  2  I2     ---   Ne      Number of Electrons
   4-  6  I3     ---   Index   Index
       8  I1     ---   P       Parity (1)
  10- 11  I2     ---   2J      Total Angular Momentum 2J
  13- 24  A12    ---   Config  Configuration (2)
  26- 40  E15.9  eV    E(Fe)   Energy for Iron (3)
  42- 56  E15.9  eV    E(Ni)   Energy for Nickel (3)

Note (1): Parity, defined as follows:
     0 = even;
     1 = odd.
Note (2): Closed shells are omitted in the configuration labels.

Note (3): Energies are relative to the ground states, except for the ground
          states themselves, for which the absolute energies are given.


Byte-by-byte Description of file: table4.dat

   Bytes Format Units   Label     Explanations

   1-  2  I2    ---     Z         [26,28] Nuclear Charge
   4-  5  I2    ---     Ne        Number of Electrons
   7-  9  I3    ---     LIndex    Lower Level Index
  11- 13  I3    ---     UIndex    Upper Level Index
  15- 21  F7.4  0.1nm   Lambda    Wavelength
  23- 29  F7.4  ---     Int       Relative Intensity (1)
  31- 34  A4    ---     Label     Label (2)

Note (1): Intensity relative to the strongest line in each charge state.

Note (2): Labels of Brown et al. (1998ApJ...502.1015B, 2002ApJS..140..589B).



History:
    From electronic version of the journal
(End)                   Greg Schwarz [AAS], Marianne Brouty [CDS]    02-Jun-2005