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J/PAZh/28/41      Eu III oscillator strengths                 (Masonkina+, 2002)
Eu III oscillator strengths and Europium abundances in Ap stars.
    Masonkina L.I., Ryabtsev A.N., Ryabchikova T.A.
   <Pis'ma Astron. Zh. 28, 41 (2002)>
   =2002PAZh...28...41M
   =2002AstL...28...34M
ADC_Keywords: Atomic physics


Abstract:
    The calculations of the spectrum and oscillator strengths for the
    4f7-(4f65d+4f66s) Eu III transitions. The calculations were
    performed with Cowan's RCN-RCG-RCE codes in the single-configuration
    approximation. The new oscillator strengths were tested by analyzing
    the Europium abundances using Eu II and Eu III lines in the spectra of
    hot peculiar stars (α2 CVn is a typical representative) and a
    cool peculiar stars (β CrB is a typical representative).

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        52       28   Semiempirical (SE) and Hartree-Fock (HF) parameters
                           of the 4f7 and 4f65d+4f66s EuIII
                           configurations and their ratios
table2.dat        77       80   Level energies for the 4f7 and 4f6(5d+6s)
                           Eu III configurations
table3.dat        80       78   Transition probabilities and oscillator strengths
                           for Eu III


See also:
     J/A+A/389/716 : Oscillator strengths for Li-like ions (Nahar, 2002)


Byte-by-byte Description of file: table1.dat

   Bytes Format   Units    Label     Explanations

   1- 15  A15     ---      Par       Parameter designation
  17- 22  I6      cm-1     SE        Semiempirical energy parameter
  24- 26  I3      cm-1     e_SE      ? Uncertainty in SE
  30- 35  I6      cm-1     HF        Hartree-Fock energy parameter
  39- 47  F9.3    ---      SE/HF     ? Ratio of SE and HF parameters
      48  A1      ---      Note      [*] Note (1)
  50- 51  A2      ---      Comments  Comments (2)

Note (1): Differences SE-HF are given for the mean configuration energies.

Note (2): Fitting parameters:
    r1,r2,r3: parameters that are related to the HF ratios during the fitting
           f: fixed parameter during the fitting


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label     Explanations

       1  I1    ---     Par       [0,1] Level parity (0=even, 1=odd)
   4- 11  F8.2  cm-1    E         Experimental level energy Eu III
      12  A1    ---     Note      [*] *: Unknown level with theoretical values
  14- 17  I4    cm-1    E-Eth     Difference between experimental and
                                   theoretical values of energy
  19- 24  F6.3  ---     g         Lande factor
  27- 30  A4    ---     Config    Configuration
  33- 35  F3.1  ---     J         Total angular momentum
  38- 77  A40   ---     Comp      Composition of this level


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

   Bytes Format   Units   Label      Explanations

   1- 50  A50     ---     Trans      Transition designation
  53- 60  F8.3    0.1nm   lambda     Wavelength
      61  A1      ---     Note       [S] Note (1)
  64- 72  E9.3    s-1     g(u)A      Transition probability
  75- 80  F6.3    ---     log(gf)    Logarithm of oscillator strength

Note (1): Wavelength is taken from Sugar & Spector, 1974, Opt. Soc. Am. 64, 1484


(End)         Veta Avedisova (INASAN)                                07-Apr-2002