# helike_jl1989o.dat

## Resolved Specific Ion Data Collections

Ion
O6+
Temperature Range
4.222 eV → 844 eV

Filename
helike_jl1989o.dat
Full Path
• Spontaneous Emission: O+6(i) → O+6(j) + hv
• Electron Impact Excitation: O+6(i) + e → O+6(j) + e
 1s2 1S0.0 0.0 cm-1 1s1 2s1 3S1.0 4524640.0 cm-1 1s1 2p1 3P4.0 4585980.0 cm-1 1s1 2s1 1S0.0 4587340.0 cm-1 1s1 2p1 1P1.0 4629200.0 cm-1 1s1 3s1 3S1.0 5338820.0 cm-1 1s1 3p1 3P4.0 5355670.0 cm-1 1s1 3s1 1S0.0 5356420.0 cm-1 1s1 3d1 3D7.0 5364420.0 cm-1 1s1 3d1 1D2.0 5365470.0 cm-1 1s1 3p1 1P1.0 5368550.0 cm-1
----------------------------------------------------------------------------

Energy levels
Taken from NSRDS NBS 3 Sect 8

Ionisation  Potential
Taken from Kelly (J Phys Chem Ref Data 16, 1987)

A values
These were taken from Kingston and Tayal (J Phys B 16, 3465, 1985). This
was an eleven state CIV3 (Hibbert) calculation. There was good agreement
between the length and velocity formulations, the results only differing
by more than 4% for 2 transitions. One of these had a small f value and
the other was the 1 1S - 3 1P transition for which the difference was 12%.
There was good agreement with the results of Schiff et al (Phys Rev A4,
885, 1971) and Weiss (1964 as quoted in Weise, Smith and Glennon NSRDS
NBS4 1966), the largest difference being 10% for the  1 1S - 3 1P
transition.

Collision Data
For transitions from 1 - 2 to 1 - 11 inclusively, the results of Tayal and
Kingston (J Phys B 17, 1383, 1984) were used. These were based on their
earlier work (J Phys B 16, 3465, 1983 and J Phys B 16, L53, 1983). This
was an eleven state close coupling R matrix calculation with th R matrix
boundary at 6.5 au. The largest energy considered was 120 Rydbergs. At each
electron energy results were obtained for 6 values of angular momentum L =0
to 5. This gave convergence for spin changing transitions. For transitions
without spin change, they calculated partial cross sections for L=6 to 20
using the Coulomb Born approximation with the same target wavefunctions as
in the R matrix calculation ( ie also as in the A value calculation).
This gave converged cross sections.

For 2 - 3, 4 and 5 and 3 - 4 and 5 and 4 - 5 transitions the results of
Pradhan, Norcross and Hummer (Astrophysics J 246, 1031, 1981) were used.
This was a Distorted Wave (5DW + 3ll') claculation with configuration
interaction wavefunctions. The total wavefunction included expansion over
the target staes of the ion as well as a second one over functions
representing bound states of the electron plus ion system. The second sum
was included for orthogonality and because it represented short range
correlation effects. The correlation functions also represent autoionising
resonance states. They were used to take account of resonances above
all the n = 2 thresholds. MQDT was used in addition to get the structure of
the resonances. Restricted to resonances converging on n = 3 states.

For n = 6 to n = 11 for n from 2 to 5, the results of Sampson, Goett and
Clark (Atomic Data and Nuclear Data Tables 29, 467, 1983) were used. They
used the Coulomb Born Exchange method and included intermediate coupling
effects but not the effects of resonances.

For transitions from levels 6, 7, 8, 9 and 10 to higher levels the results
of Sampson and Parks (Astrophysics J Supp. Series 28, 323, 1974) were used.
They gave a general formula for ions of large Z with one or two electrons
when the core of filled subshells remains unexcited. Thought to be accurate
to within 40% for Z/N >= 3 where N is the number of bound electrons per
ion.

J Lang    February 1990

----------------------------------------------------------------------------
---------------------------------------------------------------------------------
---------------------------------------------------------------------------------


### Contributors

• Jim Lang
• Douglas Sampson
• Processes
• States
• Origins