belike_dhbj95#o.dat

• Spontaneous Emission: O⁺⁴(i) → O⁺⁴(j) + hv
• Electron Impact Excitation: O⁺⁴(i) + e → O⁺⁴(j) + e

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  The effective collision strengths are calculated using the fit
  parameters of Kato,Lang,& Berrington 1990 (Atomic Data and Nuclear
  Data Tables 44,133),and the analytical formulae (3 & 4) therein.

  The data for transition probabilities among the n=2 and n=3 levels
  should be taken from Hibbert,A 1980 (J.Phys.B 13,1721) but are
  currently the ones used for the Belike data in JL1990O,
  location : jetshp.belike.data(jl1990o).

                                         D Brooks & J LANG july 1994.

  *Corrections*
  The fit parameters for the transition 2s3s(3S1)-2s2p(3P) i.e.11-2,3,4
  published in Kato et al.(1990) were incorrect.We altered these in the
  data set after being sent the correct values by T.Kato.

  Fit parameters for the fine structure transitions between levels of
  the term 2p2(3P) i.e.6,7,8 produce gammas which compare well to the
  ones from belike_jl1990o.dat but the rate coefficients calculated
  from these gammas (using the formula in Kato et al.) do not match
  the graphs published in Kato et al.

  *comment*
  The new data compare reasonably well with the belike_jl1990o.dat set.
  The largest discrepancies >50% (where comparison data is available)
  are;
  2p2(3P) - 2s2(1S0)     6,7,8 - 1            +93.4%
  2p2(3P2) - 2s2p(3P0)       8 - 2            +61.1%
  2p2(1S0) - 2s2p(3P)   10 - 2,3,4            +105.4%
  2p2(3P0) - 2s2p(3P2)       6 - 4            +60.6%

                                          D.H.Brooks 2.11.94

  *Update*
  A number of further errors and publishing mistakes were found by
  J.Lang and T.Kato and also myself. Following communications between
  us, corrections affecting the following transitions were made.
    1-11, 5-12, 12-20, 8-16, 17-20, 18-20, 19-20, 6-8, 7-8

  In addition, all the effective collision strengths were compared
  to the original Belfast calculations at 500,000 K and the following
  transitions were found to be reproduced to worse than 10%.
    15-18 to 11.9%, 16-18 to 14.9%, 6-14  to 15.4%, 15-19 to 15.9%
    8-14  to 18.9%, 17-18 to 22.7%, 18-19 to 25%,    6-8  to 38%,
    7-8   to 52.7%
  In fact the alterations have accentuated the differences between
  the 1990 & 1994 data for the 6-8,7-8 transitions. The comments on
  this comparison (above) are unaffected.

                                          D.H.Brooks 16.08.95
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Predecessors

• ADF04 belike_jl1990o.dat
• ADF04 belike_jl1990o.dat

Contributors

• David Brooks
• Jim Lang
• Keith Berrington