VI/141 Nebular [OIII] collision strengths - SSB (Storey+, 2014)
Collision strengths for nebular [O III] optical and infrared lines.
Storey P.J., Sochi T., Badnell N.R.
<Mon. Not. R. Astron. Soc. 441, 3028 (2014)>
=2014MNRAS.441.3028S 2014MNRAS.441.3028S
=2014yCat.6141....0S 2014yCat.6141....0S
ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes - radiation mechanisms: non-thermal -
planetary nebulae: general - infrared: general
Abstract:
We present electron collision strengths and their thermally averaged
values for the nebular forbidden lines of the astronomically abundant
doubly ionized oxygen ion, O2+, in an intermediate coupling scheme
using the Breit-Pauli relativistic terms as implemented in an
R-MATRIX atomic scattering code. We use several atomic targets for the
R-MATRIX scattering calculations including one with 72 atomic terms.
We also compare with new results obtained using the 20 intermediate
coupling frame transformation method. We find spectroscopically
significant differences against a recent Breit-Pauli calculation
for the excitation of the [OIII] λ4363 transition but confirm
the results of earlier calculations.
Description:
The data set consists of ten files which are labeled as
'OMEGAmn_OIII.dat' where m=1,2,3,4 and n=2,3,4,5 with m<n. The
indices m and n refer to the level index as given in the note.
In each file the first column represents the electron excitation
energy in Rydberg and the second column represents the collision
strength for the transition between the indicated levels.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
sets.dat 81 10 List of sets
oiii/* . 10 Individual sets
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See also:
VI/130 : High accuracy computed H2D+ line list - ST1 (Sochi+, 2010)
VI/136 : Dielectronic Recombination Lines of C+ - SS1 (Sochi+, 2013)
Byte-by-byte Description of file: sets.dat
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Bytes Format Units Label Explanations
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1 I1 --- m Index of first level (1)
3 I1 --- n Index of second level (1)
5- 22 A18 --- FileName Name of the file in subdirectory oiii
24- 81 A58 --- Title Title of the file
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Note (1): Levels as follows:
--------------------------------------------
Level Index Level Designation
--------------------------------------------
1 = 1s2 2s2 2p2 3P0
2 = 1s2 2s2 2p2 3P1
3 = 1s2 2s2 2p2 3P2
4 = 1s2 2s2 2p2 1D2
5 = 1s2 2s2 2p2 1S0
--------------------------------------------
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Byte-by-byte Description of file: oiii/*
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.7 Ry E Electron excitation energy (in Rydberg)
11- 19 E9.3 --- Omega Electron collision strength (unitless)
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Acknowledgements:
Taha Sochi: University College London, t.sochi(at)ucl.ac.uk
P.J. Storey: University College London, pjs(at)star.ucl.ac.uk
N.R. Badnell: University of Strathclyde, badnell(at)phys.strath.ac.uk
(End) Taha Sochi [University College London], Patricia Vannier [CDS] 06-May-2014