J/A+A/500/1253 Electron-impact excitation of ArIII (Munoz Burgos+, 2009)
Electron-impact excitation of Ar2+.
Munoz Burgos J.M., Loch S.D., Ballance C.P., Boivin R.F.
<Astron. Astrophys. 500, 1253 (2009)>
=2009A&A...500.1253M 2009A&A...500.1253M
ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes - ISM: planetary nebulae: general
Abstract:
Emission from Ar III is seen in planetary nebulae, in H II regions,
and from laboratory plasmas. The analysis of such spectra requires
accurate electron impact excitation data.
The aim of this work is to improve the electron impact excitation data
available for Ar2+, for application in studies of planetary
nebulae and laboratory plasma spectra. The effects of the new data on
diagnostic line ratios are also studied.
Electron-impact excitation collision strengths have been calculated
using the R-Matrix Intermediate-Coupling Frame-Transformation method
and the R-Matrix Breit-Pauli method. Excitation cross sections are
calculated between all levels of the configurations 3s23p4,
3s3p5, 3p6, 3p53d, and 3s23p3nl (3d≤nl≤5s).
Maxwellian effective collision strengths are generated from the
collision strength data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
energy.dat 44 29 Results for the first 29 levels
avalues.dat 72 21 Comparisons of selected radiative rates for
transitions in Ar2+
ecol.dat 68 13 Effective collision strengths for transitions
between the 3s23p4 levels
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See also:
J/A+AS/147/253 : IRON Project. XLV. Ar XIII and Fe XXI (Nahar, 2000)
J/A+AS/147/253 : IRON Project. XLV. Ar XIII and Fe XXI (Nahar, 2000)
J/A+A/436/1141 : Radiative rates in Ar XIII, Ar XIV + Ar XV (Aggarwal+, 2005)
J/A+A/441/831 : Electron impact excitation of Ar XVII (Aggarwal+, 2005)
J/A+A/487/383 : Ar XVIII radiative and excitation rates (Aggarwal+, 2008)
Byte-by-byte Description of file: energy.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Conf Configuration
17 A1 --- --- [(]
18- 24 A7 --- Level 2S+1LJ term
25 A1 --- --- [)]
27- 32 F6.4 Ry ENIST NIST energy
34- 39 F6.4 Ry E Present energy
41- 44 F4.1 % e_E rms uncertainty on E
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Byte-by-byte Description of file: avalues.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- iConf Configuration (initial)
12- 14 A3 --- --- [-->]
16- 25 A10 --- fConf Configuration (final)
27- 33 A7 --- iLevel Level (initial)
35- 37 A3 --- --- [-->]
39- 45 A7 --- fLevel Level (final)
48- 54 E7.4 s-1 AjkNIST NIST radiative rate, Ajk
57- 63 E7.4 s-1 Ajk ? Present radiative rate, Ajk
66- 72 E7.4 s-1 AjkM Mendoza & Zeippen (1983MNRAS.202..981M 1983MNRAS.202..981M)
radiative rate, Ajk
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Byte-by-byte Description of file: ecol.dat
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Bytes Format Units Label Explanations
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1- 8 I8 K T Temperature
10- 14 F5.3 --- ESC1 3P1-3P2 level effective collision strength
16- 20 F5.3 --- ESC2 3P0-3P2 level effective collision strength
22- 26 F5.3 --- ESC3 1D2-3P2 level effective collision strength
28- 32 F5.3 --- ESC4 1S0-3P2 level effective collision strength
34- 38 F5.3 --- ESC5 3P0-3P1 level effective collision strength
40- 44 F5.3 --- ESC6 1D2-3P1 level effective collision strength
46- 50 F5.3 --- ESC7 1S0-3P1 level effective collision strength
52- 56 F5.3 --- ESC8 1D2-3P0 level effective collision strength
58- 62 F5.3 --- ESC9 1S0-3P0 level effective collision strength
64- 68 F5.3 --- ESC10 1S0-1D2 level effective collision strength
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Acknowledgements:
Jorge Munoz, munozjm(at)auburn.edu
(End) Patricia Vannier [CDS] 06-Apr-2009