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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
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:
FileName Lrecl Records Explanations
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
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
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: avalues.dat
Bytes Format Units Label Explanations
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) radiative rate, Ajk
Byte-by-byte Description of file: ecol.dat
Bytes Format Units Label Explanations
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
Acknowledgements: Jorge Munoz, munozjm(at)
(End) Patricia Vannier [CDS] 06-Apr-2009
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