J/A+A/446/1185 Electron collisions with Fe IV ions (McLaughlin+, 2006)
Electron collisions with Fe-peak elements: Fe IV
I. Forbidden transitions: 3d(5) - 3d(4)4s and 3d(5) - 3d(4)4p manifolds.
McLaughlin B.M., Hibbert A., Scott M.P., Noble C.J., Burke V.M., Burke P.G.
<Astron. Astrophys. 446, 1185 (2006)>
=2006A&A...446.1185M 2006A&A...446.1185M
ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes
Description:
Effective collision strengths are presented for transitions from the
16 states of the 3d(5) configuration to the higher lying states
belonging to the 3d(4)4s and 3d(4)4p configurations of Fe IV.
Collision strength calculations performed with 108 coupled states (in
LS-coupling) using the parallel R-matrix code PRMAT are used to
determine the effective collision strengths by averaging them over a
Maxwellian temperature distribution for the electrons. Each of the LS
term level is assigned a label ranging from 1 to 108. Note; 1 to 16
refers to states associated with the 3d(5) configuration; 6S, 4G, 4P,
4D, 2I, 2D3, 2F2, 4F, 2H, 2G2, 2F1, 2S, 2D2, 2G, 2P and 2D1. Effective
collision strengths data for 11 temperatures are presented (non-zero
values) for electron temperatures ranging from ∼2000 to 1000000K
(i.e. log10(T)=3.3 to log10(T)=6.0).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
levels.dat 50 108 Fe IV levels (108) absolute energies and relative
to the ground state 3d(5) 6S and the level index
used in tables.dat
tables.dat 161 1103 Fe IV non-zero effective collision strengths (ECS)
for forbidden transitions and 3d(4)4p manifolds.
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See also:
J/A+AS/126/373 : IRON Project XXVII. Fe IV collision strengths (Zhang+ 1997)
J/A+A/437/345 : IRON Project LIX. Fe IV radiative trans. prob. (Nahar+, 2005)
Byte-by-byte Description of files: levels.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Seq Index for the 108-levels of Fe IV
6- 18 A13 --- Conf Configuration and Term of the Fe IV level
19- 36 F18.7 --- Eau Absolute energies in atomic units (au) for Fe IV
37- 50 F14.7 Ry E Energies relative to the ground state of Fe IV
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Byte-by-byte Description of files: tables.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- Trans Forbidden transition
21- 23 I3 --- Seq0 Initial state label
25- 25 A1 --- --- Separator between initial and final state
26- 28 I3 --- Seq1 Final state label
30- 41 E12.4 --- ECS2k Effective Collision Strengths at T= 2000 Kelvin
42- 53 E12.4 --- ECS5k Effective Collision Strengths at T= 5000 Kelvin
54- 65 E12.4 --- ECS10k Effective Collision Strengths at T= 10000 Kelvin
66- 77 E12.4 --- ECS20k Effective Collision Strengths at T= 20000 Kelvin
78- 89 E12.4 --- ECS40k Effective Collision Strengths at T= 40000 Kelvin
90-101 E12.4 --- ECS70k Effective Collision Strengths at T= 70000 Kelvin
102-113 E12.4 --- ECS100k Effective Collision Strengths at T= 100000 Kelvin
114-125 E12.4 --- ECS200k Effective Collision Strengths at T= 200000 Kelvin
126-137 E12.4 --- ECS400k Effective Collision Strengths at T= 400000 Kelvin
138-149 E12.4 --- ECS700k Effective Collision Strengths at T= 700000 Kelvin
150-161 E12.4 --- ECS1M Effective Collision Strengths at T=1000000 Kelvin
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Acknowledgements: Brendan M McLaughlin
(End) Brendan M McLaughlin [QUB, UK] 14-Feb-2006