J/A+A/488/365 NiXIX effective collision strengths (Aggarwal+, 2008)
Effective collision strengths for transitions in Ni XIX.
Aggarwal K.M., Keenan F.P.
<Astron. Astrophys. 488, 365 (2008)>
=2008A&A...488..365A 2008A&A...488..365A
ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes
Abstract:
In this paper we report electron impact collision strengths and
excitation rates for transitions among the lowest 89 levels of NiXIX.
The Dirac atomic R-matrix code (DARC) is adopted for the calculations
of collision strengths and subsequently the effective collision
strengths.
Collision strengths for resonance transitions among 89 levels arising
from the (1s2) 2s22p6, 2s22p53l, 2s2p63l, 2s22p54l,
and 2s2p64l configurations of NiXIX are reported over a wide energy
range below 250Ryd. Additionally, effective collision strengths for
all 3916 transitions among the 89 levels are listed over a wide
temperature range below 107K. Comparisons are made among different
calculations and the accuracy of the data is assessed. Finally,
comparisons between theoretical and experimental intensity ratios of
some prominent lines of NiXIX are discussed.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 39 89 Target levels of NiXIX and their threshold
energies (in Ryd)
table2.dat 65 88 Collision strengths for resonance transitions
of NiXIX
table3.dat 105 3916 Effective collision strengths for transitions
in NiXIX
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See also:
J/A+A/427/763 : Fe X E1, E2,M1 and M2 transitions (Aggarwal+, 2004)
J/A+A/439/1215 : Fe X effective collision strengths (Aggarwal+, 2005)
J/A+A/399/799 : Fe XI effective collision strengths (Aggarwal+, 2003)
J/A+A/418/371 : Fe XIII electron impact excitation (Aggarwal+, 2004)
J/A+A/429/1117 : Fe XIII effective collision strengths (Aggarwal+, 2005)
J/ApJS/121/265 : Fe XV oscillator Strengths and Radiative Rates (Deb+, 1999)
J/A+A/410/349 : Fe XV effective collision strengths (Aggarwal+, 2003)
J/A+A/450/1249 : Fe XVI radiative and excitation rates (Aggarwal+, 2006)
J/A+A/420/783 : Fe XVII electron impact excitation (Aggarwal+, 2004)
J/A+A/416/383 : Fe XVIII transition probabilities (Jonauskas+, 2004)
J/ApJS/123/311 : O III excitation rate coefficients (Aggarwal+, 1999)
J/A+A/407/769 : Ca XV excitation rates for transitions (Aggarwal+, 2003)
J/A+A/432/1151 : Al XIII electron impact excitation (Aggarwal+, 2005)
J/A+A/436/1141 : Ar XIII, Ar XIV + Ar XV radiative rates (Aggarwal+, 2005)
J/A+A/441/831 : Ar XVII electron impact excitation (Aggarwal+, 2005)
J/A+A/460/331 : Fe IX radiative and excitation rates (Aggarwal+, 2006)
J/A+A/463/399 : Fe XVI radiative rates (Aggarwal+, 2007)
J/A+A/484/879 : Fe XXVII radiative and excitation rates (Aggarwal+, 2008)
J/A+A/487/383 : Ar XVIII radiative and excitation rates (Aggarwal+, 2008)
J/A+A/486/1053 : O IV radiative and excitation rates (Aggarwal+, 2008)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Index [1,89] Index
4- 15 A12 --- Conf Configuration
19- 28 A10 --- Level Level
31- 39 F9.5 Ry GRASP Threshold energy
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- i [1,88] i lower level index of the transition
4- 5 I2 --- j [2,89] j upper level index of the transition
7- 15 E9.4 --- CS110 Collision strength at 110Ry
17- 25 E9.4 --- CS130 Collision strength at 130Ry
27- 35 E9.4 --- CS150 Collision strength at 150Ry
37- 45 E9.4 --- CS200 Collision strength at 200Ry
47- 55 E9.4 --- CS250 Collision strength at 250Ry
57- 65 E9.4 --- CSFAC Collision strength from FAC calculation at
a single excited energy of ∼145Ry (1)
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Note (1): Flexible Atomic Code, Gu (2003ApJ...582.1241G 2003ApJ...582.1241G)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- i [1,88] i lower level index of the transition
4- 5 I2 --- j [2,89] j upper level index of the transition
7- 15 E9.5 --- ECS5.20 Effective collision strength at logTe=5.20K
17- 25 E9.5 --- ECS5.40 Effective collision strength at logTe=5.40K
27- 35 E9.5 --- ECS5.60 Effective collision strength at logTe=5.60K
37- 45 E9.5 --- ECS5.80 Effective collision strength at logTe=5.80K
47- 55 E9.5 --- ECS6.00 Effective collision strength at logTe=6.00K
57- 65 E9.5 --- ECS6.20 Effective collision strength at logTe=6.20K
67- 75 E9.5 --- ECS6.40 Effective collision strength at logTe=6.40K
77- 85 E9.5 --- ECS6.60 Effective collision strength at logTe=6.60K
87- 95 E9.5 --- ECS6.80 Effective collision strength at logTe=6.80K
97-105 E9.5 --- ECS7.00 Effective collision strength at logTe=7.00K
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Acknowledgements:
Kanti Aggarwal, K.Aggarwal(at)qub.ac.uk
(End) Patricia Vannier [CDS] 19-Jun-2008