J/A+A/537/A12 Effective collision strength of Ni XVII (Hudson+, 2012)
DARC R-matrix calculation of fine-structure effective collision
strengths for the electron impact excitation of Ni XVII.
Hudson C.E., Norrington P.H., Ramsbottom C.A., Scott M.P.
<Astron. Astrophys. 537, A12 (2012)>
=2012A&A...537A..12H 2012A&A...537A..12H
ADC_Keywords: Atomic physics
Keywords: atomic processes - line: formation - methods: analytical
Abstract:
Electron-impact excitation collision strengths are required for the
analysis and interpretation of stellar observations. This calculation
aims to provide effective collision strengths for the Ni XVII ion
using collision strength data which include contributions from
resonances.
Description:
The effective collision strengths are presented in this table for all
transitions among the lowest 37 fine-structure levels belonging to the
3s(2), 3s3p, 3p(2), 3p3d, 3d(2) and 3s4s configurations of Ni XVII.
These have been calculated using the DARC R-matrix codes. Each
fine-structure level is assigned an index number in Table 2 of the
manuscript ranging from 1 to 37. These index values are used here in
Table 8 to refer to particular transitions, eg. Index 1-3 denotes the
transition 3s(2) 1SE(J=0)--3s3p 3PO(J=1).
The effective collision strengths for each transition are presented in
rows for a number of electron temperatures ranging from log10(T)=4.5
to log10(T)=8.5 in steps of 0.5dex.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 27 37 J-levels
table5.dat 86 666 Effective collision strengths for Ni XVII
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See also:
J/A+AS/125/543 : Effective collision strengths for Mg VI (Ramsbottom+ 1997)
J/A+A/430/725 : N II effective collision strengths (Hudson+, 2005)
J/A+A/432/731 : Effective collision strengths for C II (Wilson+, 2005)
J/A+A/436/1131 : Effective collision strengths for Al III (Hudson+ 2005)
J/A+A/452/1113 : S V effective collision strengths (Hudson+, 2006)
J/A+A/475/765 : Fine structure forbidden lines in FeII (Ramsbottom+, 2007)
J/A+A/493/967 : Mg IX effective collision strengths (Hudson, 2009)
J/A+A/494/729 : Effective collision strength of Mg V (Hudson+, 2009)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Index [1/37] Index number
6- 13 A8 --- LS LS state
17 I1 --- J J-value
21- 27 F7.4 Ry E Energy of fine-structure level in Rydbergs
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- i1 [1/36] Index number of lower transition state
4- 5 I2 --- i2 [2/37] Index number of upper transition state
7- 14 E8.3 --- ECS4.5 Effective collision at log(T)=4.50
16- 23 E8.3 --- ECS5.0 Effective collision at log(T)=5.00
25- 32 E8.3 --- ECS5.5 Effective collision at log(T)=5.50
34- 41 E8.3 --- ECS6.0 Effective collision at log(T)=6.00
43- 50 E8.3 --- ECS6.5 Effective collision at log(T)=6.50
52- 59 E8.3 --- ECS7.0 Effective collision at log(T)=7.00
61- 68 E8.3 --- ECS7.5 Effective collision at log(T)=7.50
70- 77 E8.3 --- ECS8.0 Effective collision at log(T)=8.00
79- 86 E8.3 --- ECS8.5 Effective collision at log(T)=8.50
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Acknowledgements:
Claire Hudson, c.hudson(at)qub.ac.uk
(End) Claire Hudson [Queens Univ. Belfast], Patricia Vannier [CDS] 12-Dec-2011