J/A+A/418/1171 FeXVIII-FeXXIII effective collision strengths (Bautista+, 2004)
K-shell photoionization and electron impact excitation of Fe XVIII-Fe XXIII.
Bautista M., Mendoza C., Kallman T.R., Palmeri P.
<Astron. Astrophys. 418, 1171 (2004)>
=2004A&A...418.1171B 2004A&A...418.1171B
ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes - line: formation
Abstract:
Photoabsorption cross sections across the K edge of Fe XVIII-Fe XXIII
and electron impact K-shell excitation effective collision strengths
in Fe XVIII-Fe XXIII have been computed with the Breit-Pauli R-matrix
method. The target models are represented with all the fine-structure
levels within the n=2 complex, built up from single-electron orbital
bases obtained in a Thomas-Fermi-Dirac statistical model potential.
The effects of radiation and spectator Auger dampings are taken into
account by means of an optical potential. In photoabsorption, these
effects cause the resonances converging to the K thresholds to display
symmetric profiles of constant width that smear the edge, with
important implications in spectral analysis. In collisional
excitation, they attenuate resonances making their contributions to
the effective collision strength practically negligible.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
elevels.dat 68 191 Electron impact K-shell excitation energy levels
for FeXVIII to FeXXIII
table1b.dat 103 3 *FeXVIII electron impact K-shell excitation
effective collision strengths
table2b.dat 103 75 *FeXIX electron impact K-shell excitation
effective collision strengths
table3b.dat 103 360 FeXX electron impact K-shell excitation
effective collision strengths
table4b.dat 103 1035 *FeXXI electron impact K-shell excitation
effective collision strengths
table5b.dat 103 1120 *FeXXII electron impact K-shell excitation
effective collision strengths
table6b.dat 103 735 *FeXXIII electron impact K-shell excitation
effective collision strengths
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Note on table1b.dat, table2b.dat, table4b.dat, table6b.dat:
BPRM calculation including radiation and Auger damping.
Note on table5b.dat: Collision strength for K-shell excitation including Auger
and radiative damping. Computations are done in LS coupling split over fine
structure using TCCs.
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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: elevels.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Nion Number of ionizations (=Ion-1)
5- 6 I2 --- Z [26] Nuclear charge
8- 9 I2 --- Ion Ionisation stage (Nion+1)
11- 19 F9.0 cm-1 Pot Ion potential
21- 22 I2 --- Level Level number
26- 51 A26 --- Conf Electron configuration, (2S+1)L( J)
60- 68 F9.0 cm-1 E Level energy
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Byte-by-byte Description of file: table1b.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ion Ionisation stage
3- 5 A3 --- --- [.00]
7 I1 --- --- [3] dummy integer
9- 10 I2 --- Ulevel Upper level
12- 13 I2 --- Llevel Lower level
15- 22 E8.2 s-1 A A-value
24- 31 E8.2 --- ECS(6.48E+04) Effective collision strengths at T=6.48E+04K
33- 40 E8.2 --- ECS(1.62E+05) Effective collision strengths at T=1.62E+05K
42- 49 E8.2 --- ECS(3.24E+05) Effective collision strengths at T=3.24E+05K
51- 58 E8.2 --- ECS(6.48E+05) Effective collision strengths at T=6.48E+05K
60- 67 E8.2 --- ECS(1.62E+06) Effective collision strengths at T=1.62E+06K
69- 76 E8.2 --- ECS(3.24E+06) Effective collision strengths at T=3.24E+06K
78- 85 E8.2 --- ECS(6.48E+06) Effective collision strengths at T=6.48E+06K
87- 94 E8.2 --- ECS(1.62E+07) Effective collision strengths at T=1.62+07K
96-103 E8.2 --- ECS(Inf) High temperature limit
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Byte-by-byte Description of file: table2b.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ion Ionisation stage
3- 5 A3 --- --- [.00]
7 I1 --- --- [3] dummy integer
9- 10 I2 --- Ulevel Upper level
12- 13 I2 --- Llevel Lower level
15- 22 E8.2 s-1 A A-value
24- 31 E8.2 --- ECS(7.22E+04) Effective collision strengths at T=7.22E+04K
33- 40 E8.2 --- ECS(1.80E+05) Effective collision strengths at T=1.80E+05K
42- 49 E8.2 --- ECS(3.61E+05) Effective collision strengths at T=3.61E+05K
51- 58 E8.2 --- ECS(7.22E+05) Effective collision strengths at T=7.22E+05K
60- 67 E8.2 --- ECS(1.80E+06) Effective collision strengths at T=1.80E+06K
69- 76 E8.2 --- ECS(3.61E+06) Effective collision strengths at T=3.61E+06K
78- 85 E8.2 --- ECS(7.22E+06) Effective collision strengths at T=7.22E+06K
87- 94 E8.2 --- ECS(1.80E+07) Effective collision strengths at T=1.80+07K
96-103 E8.2 --- ECS(Inf) High temperature limit
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Byte-by-byte Description of file: table3b.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ion Ionisation stage
3- 5 A3 --- --- [.00]
7 I1 --- --- [3] dummy integer
9- 10 I2 --- Ulevel Upper level
12- 13 I2 --- Llevel Lower level
15- 22 E8.2 s-1 A A-value
24- 31 E8.2 --- ECS(8.00E+04) Effective collision strengths at T=8.00E+04K
33- 40 E8.2 --- ECS(2.00E+05) Effective collision strengths at T=2.00E+05K
42- 49 E8.2 --- ECS(4.00E+05) Effective collision strengths at T=4.00E+05K
51- 58 E8.2 --- ECS(8.00E+05) Effective collision strengths at T=8.00E+05K
60- 67 E8.2 --- ECS(2.00E+06) Effective collision strengths at T=2.00E+06K
69- 76 E8.2 --- ECS(4.00E+06) Effective collision strengths at T=4.00E+06K
78- 85 E8.2 --- ECS(8.00E+06) Effective collision strengths at T=8.00E+06K
87- 94 E8.2 --- ECS(2.00E+07) Effective collision strengths at T=2.00+07K
96-103 E8.2 --- ECS(Inf) High temperature limit
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Byte-by-byte Description of file: table4b.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ion Ionisation stage
3- 5 A3 --- --- [.00]
7 I1 --- --- [3] dummy integer
9- 10 I2 --- Ulevel Upper level
12- 13 I2 --- Llevel Lower level
15- 22 E8.2 s-1 A A-value
24- 31 E8.2 --- ECS(8.82E+04) Effective collision strengths at T=8.82E+04K
33- 40 E8.2 --- ECS(2.20E+05) Effective collision strengths at T=2.20E+05K
42- 49 E8.2 --- ECS(4.41E+05) Effective collision strengths at T=4.41E+05K
51- 58 E8.2 --- ECS(8.82E+05) Effective collision strengths at T=8.82E+05K
60- 67 E8.2 --- ECS(2.20E+06) Effective collision strengths at T=2.20E+06K
69- 76 E8.2 --- ECS(4.41E+06) Effective collision strengths at T=4.41E+06K
78- 85 E8.2 --- ECS(8.82E+06) Effective collision strengths at T=8.82E+06K
87- 94 E8.2 --- ECS(2.20E+07) Effective collision strengths at T=2.20+07K
96-103 E8.2 --- ECS(Inf) High temperature limit
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Byte-by-byte Description of file: table5b.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ion Ionisation stage
3- 5 A3 --- --- [.00]
7 I1 --- --- [3] dummy integer
9- 10 I2 --- Ulevel Upper level
12- 13 I2 --- Llevel Lower level
15- 22 E8.2 s-1 A A-value
24- 31 E8.2 --- ECS(9.68E+04) Effective collision strengths at T=9.68E+04K
33- 40 E8.2 --- ECS(2.42E+05) Effective collision strengths at T=2.42E+05K
42- 49 E8.2 --- ECS(4.84E+05) Effective collision strengths at T=4.84E+05K
51- 58 E8.2 --- ECS(9.68E+05) Effective collision strengths at T=9.68E+05K
60- 67 E8.2 --- ECS(2.42E+06) Effective collision strengths at T=2.42E+06K
69- 76 E8.2 --- ECS(4.84E+06) Effective collision strengths at T=4.84E+06K
78- 85 E8.2 --- ECS(9.68E+06) Effective collision strengths at T=9.68E+06K
87- 94 E8.2 --- ECS(2.42E+07) Effective collision strengths at T=2.42+07K
96-103 E8.2 --- ECS(Inf) High temperature limit
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Byte-by-byte Description of file: table6b.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ion Ionisation stage
3- 5 A3 --- --- [.00]
7 I1 --- --- [3] dummy integer
9- 10 I2 --- Ulevel Upper level
12- 13 I2 --- Llevel Lower level
15- 22 E8.2 s-1 A A-value
24- 31 E8.2 --- ECS(1.06E+04) Effective collision strengths at T=1.06E+04K
33- 40 E8.2 --- ECS(2.64E+05) Effective collision strengths at T=2.64E+05K
42- 49 E8.2 --- ECS(5.29E+05) Effective collision strengths at T=5.29E+05K
51- 58 E8.2 --- ECS(1.06E+05) Effective collision strengths at T=1.06E+05K
60- 67 E8.2 --- ECS(2.64E+06) Effective collision strengths at T=2.64E+06K
69- 76 E8.2 --- ECS(5.29E+06) Effective collision strengths at T=5.29E+06K
78- 85 E8.2 --- ECS(1.06E+06) Effective collision strengths at T=1.06E+06K
87- 94 E8.2 --- ECS(2.64E+07) Effective collision strengths at T=2.64+07K
96-103 E8.2 --- ECS(Inf) High temperature limit
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Acknowledgements: Manuel Bautista
(End) Patricia Bauer [CDS] 16-Feb-2004