J/A+A/418/363 Effective collision strengths for Cl II (Tayal+, 2004)
Electron-impact excitation of fine-structure levels in Cl II.
Tayal S.S.
<Astron. Astrophys. 418, 363 (2004)>
=2004A&A...418..363T 2004A&A...418..363T
ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes - line-formation
Abstract:
The B-spline basis has been used in the R-matrix approach to calculate
electron impact excitation collision strengths for transitions between
the 3s23p4 3P0,1,2, 1D2 and 1S0 levels and from these
levels to the fine-structure levels of the excited 3s3p5,
3s23p34s, 3s23p33d, 3s23p34p and 3s23p34d
configurations of Cl II. We considered 23 LS states 3s23p4 3P,
1D, 1S, 3s3p5 3Po, 3s23p3(4So)4s 5,3So,
3s23p3(4So)3d 5,3Do, 3s23p3(2Do)3d 1Po,
1So, 3Fo, 3Do, 3Po, 3s23p3(2Do)4s 3,1Do,
3s23p 3(2Po)4s 3,1Po, 3s23p3(4So)4p 5,3P,
3s23p3(2Po)3d 3,1Po, 3Do and
3s23p3(2Do)4d 3Po in the close- coupling expansion that
give rise to 51 fine-structure levels. The non-orthogonal orbitals are
used for an accurate representation of both the target wavefunctions
and the R-matrix basis functions. The collision strengths for
transitions between fine-structure levels are calculated by
transforming the LS-coupled K-matrices to K-matrices in an
intermediate coupling scheme. The Rydberg series of resonances
converging to excited state thresholds make substantial contributions
to collision strengths. The thermally averaged collision strengths
have been obtained by integrating collision strengths over a
Maxwellian distribution of electron energies and these are listed in
Table 2 for logT from 3.3 to 5.6K.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 168 180 Effective collision strengths for fine-structure
transitions in Cl II as a function of electron
temperature T (Kelvin)
table2.tex 112 405 LaTeX version of table2
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See also:
J/A+A/436/1131 : Effective collision strengths for Al III (Hudson+ 2005)
J/A+A/399/799 : Effective collision strengths for Fe XI (Aggarwal+, 2003)
J/A+A/410/349 : Effective collision strengths in Fe XV (Aggarwal+, 2003)
J/A+AS/103/273 : Effective collision strengths for C-like ions (Lennon+ 1994)
J/A+AS/108/1 : Effective collision strengths for O-like ions (Butler+, 1994)
J/A+AS/125/543 : Effective collision strengths for Mg VI (Ramsbottom+ 1997)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 43 A43 --- Tran Transition
45- 53 F9.2 0.1nm lambda Wavelength
55- 59 F5.3 --- ECS3.3 Effective collision strength at log(T)=3.3
61- 65 F5.3 --- ECS3.5 Effective collision strength at log(T)=3.5
67- 71 F5.3 --- ECS3.6 Effective collision strength at log(T)=3.6
73- 78 F6.4 --- ECS3.7 Effective collision strength at log(T)=3.7
79- 83 F5.3 --- ECS3.8 Effective collision strength at log(T)=3.8
85- 89 F5.3 --- ECS3.9 Effective collision strength at log(T)=3.9
91- 95 F5.3 --- ECS4.0 Effective collision strength at log(T)=4.0
97-101 F5.3 --- ECS4.3 Effective collision strength at log(T)=4.3
103-107 F5.3 --- ECS4.5 Effective collision strength at log(T)=4.5
109-113 F5.3 --- ECS4.6 Effective collision strength at log(T)=4.6
115-119 F5.3 --- ECS4.8 Effective collision strength at log(T)=4.8
121-125 F5.3 --- ECS4.9 Effective collision strength at log(T)=4.9
127-131 F5.3 --- ECS5.0 Effective collision strength at log(T)=5.0
133-137 F5.3 --- ECS5.3 Effective collision strength at log(T)=5.3
139-143 F5.3 --- ECS5.5 Effective collision strength at log(T)=5.5
145-149 F5.3 --- ECS5.6 Effective collision strength at log(T)=5.6
151-155 F5.3 --- ECS5.8 Effective collision strength at log(T)=5.8
157-161 F5.3 --- ECS5.9 Effective collision strength at log(T)=5.9
163-168 F6.3 --- ECS6.0 Effective collision strength at log(T)=6.0
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Acknowledgements: Swaraj Tayal
(End) Patricia Bauer [CDS] 12-Feb-2004