O II - VERSION 5.1

The CHIANTI database consists of 4 primary ASCII files for each ion in the database.

• o_2.elvlc (energy levels)

  contains the energy levels in cm^(-1) It includes both experimental data and theoretical values of the levels energies.

  References:

  %energy levels: Martin, W.C., Sugar, J., Musgrove, A., Dalton, G.R., 1995, 
     NIST Database for Atomic Spectroscopy, Version 1.0, NIST Standard Reference Database 61.
  %Theoretical energy levels: Bhatia A.K. (private communications)
  % produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  % Enrico Landi 1995
  

  
  

• o_2.wgfa (radiative data)

  contains wavelengths, gf and A values for each transition. Wavelengths are based on experimental level energies where available; wavelengths calculated from theoretical energies are less accurate and are given as negative values.

  References:

  %observed energy levels: Martin, W.C., Sugar, J., Musgrove, A., Dalton, G. R., 1995,
      NIST Database for Atomic Spectroscopy, Version 1.0, NIST Standard Reference Database 61
  %Theoretical energy levels: Bhatia A.K. (private communications)
  %oscillator strengths ground configuration: Zeippen, C.J., 1987, A&A, 173, 410
  %other oscillator strengths: Bhatia A.K. (private communications)
  % produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  % Enrico Landi 2001
  

  
  

• o_2.splups (electron collision data)

  contains the spline fits to the electron collision strengths scaled according to Burgess and Tully (1992). Accurate replication of the temperature averaged collision strength over a wide range of temperatures can be accomplished with the data in this file.

  References:

  
  %filename: o_2.splups
  %oscillator strengths allowed transitions: Bhatia A.K. (private communications)
  %effective collision strengths: Mc Laughlin, B.M., Bell, K.L., 1994, ApJSS, 94, 825
  %collision strengths transitions among levels within the same multiplet and for transitions
        involving 2p5 configuration: Bhatia A.K. (private communications)
  %Comment: the effective collision strengths are accurate in the temperature range 3.7 < Log T < 6.0
  %comment: collisional data for 1-2 and 1-3 transitions in V.4.02 were mistakenly exchanged.
            This has now been corrected (Aug 2003).
  %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  % Enrico Landi - Aug 2003
  

  
  

• o_2.psplups (electron collision data) - Not Present in CHIANTI 5.1

  contains the spline fits to the scaled proton collision strengths.
  

  The html table below contains the radiative data of the brightest lines sorted in wavelength

  
  

• o_2_table.html (html table)