J/A+A/475/765 Fine structure forbidden lines in FeII (Ramsbottom+, 2007)
Electron-impact excitation of Fe II. Collision strengths and effective
collision strengths for low-lying fine-structure forbidden transitions.
Ramsbottom C.A., Hudson C.E., Norrington P.H., Scott M.P.
<Astron. Astrophys. 475, 765 (2007)>
=2007A&A...475..765R 2007A&A...475..765R
ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes - transitions; plasmas
Abstract:
Absorption or emission lines of Fe II are observed in many
astrophysical spectra and accurate atomic data are required to
interpret these lines. The calculation of electron-impact excitation
rates for transitions among even the lowest lying levels of Fe II
is a formidable task for theoreticians.
Description:
This table presents the effective collision strengths for 120
low-lying forbidden lines of Fe II. The temperatures considered are
listed at the top of the table in three rows with 10 columns in each
row, the first column labels the transition considered and the
following nine columns list the temperatures. The effective collision
strengths are subsequently listed for each transition and for each
temperature. The index values for each level have been assigned in
Table 1 to denote the particular transition.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 45 16 Target state energies in rydbergs relative to
the ground state of FeII
table3.dat 221 120 Effective Collision Strengths for low-lying
forbidden transitions in FeII
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See also:
J/A+A/399/799 : Fe XI trans. effective collision strengths (Aggarwal+, 2003)
J/A+A/410/349 : Fe XV effective collision strengths (Aggarwal+, 2003)
J/A+A/418/1171 : FeXVIII-FeXXIII effective collision strengths (Bautista+ 2004)
J/A+A/429/1117 : Fe XIII effective collision strengths (Aggarwal+, 2005)
J/A+A/439/1215 : Fe X trans. effective collision strengths (Aggarwal+, 2005)
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 Index
4- 18 A15 --- Term Term
21 I1 --- 2J 2J value
23- 29 F7.5 Ry E Energy
31- 37 F7.5 Ry Enist Observed energy value from the NIST databank (1)
39- 45 F7.5 Ry EB88 Theoretical Energy value from Berrington et al.
(1988JPhB...21..339B 1988JPhB...21..339B)
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Note (1): NIST: http://www.physics.nist.gov/PhysRefData
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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 [1,15] i level of transition
3 A1 --- --- [-]
4- 5 I2 --- j [2,16] j level of transition
7- 13 E7.3 --- ECS(30) Effective collision strength at Te=30K
15- 21 E7.3 --- ECS(100) Effective collision strength at Te=100K
23- 29 E7.3 --- ECS(300) Effective collision strength at Te=300K
31- 37 E7.3 --- ECS(500) Effective collision strength at Te=500K
39- 45 E7.3 --- ECS(750) Effective collision strength at Te=750K
47- 53 E7.3 --- ECS(1000) Effective collision strength at Te=1000K
55- 61 E7.3 --- ECS(1300) Effective collision strength at Te=1300K
63- 69 E7.3 --- ECS(1500) Effective collision strength at Te=1500K
71- 77 E7.3 --- ECS(1800) ?=9.99E-1 Effective collision strength
at Te=1800K
79- 85 E7.3 --- ECS(2000) Effective collision strength at Te=2000K
87- 93 E7.3 --- ECS(2300) Effective collision strength at Te=2300K
95-101 E7.3 --- ECS(2500) Effective collision strength at Te=2500K
103-109 E7.3 --- ECS(5000) Effective collision strength at Te=5000K
111-117 E7.3 --- ECS(7500) Effective collision strength at Te=7500K
119-125 E7.3 --- ECS(10000) Effective collision strength at Te=10000K
127-133 E7.3 --- ECS(13000) Effective collision strength at Te=13000K
135-141 E7.3 --- ECS(15000) Effective collision strength at Te=15000K
143-149 E7.3 --- ECS(18000) Effective collision strength at Te=18000K
151-157 E7.3 --- ECS(20000) ?=9.99E-1 Effective collision strength
at Te=20000K
159-165 E7.3 --- ECS(30000) Effective collision strength at Te=30000K
167-173 E7.3 --- ECS(40000) Effective collision strength at Te=40000K
175-181 E7.3 --- ECS(50000) Effective collision strength at Te=50000K
183-189 E7.3 --- ECS(60000) Effective collision strength at Te=60000K
191-197 E7.3 --- ECS(70000) Effective collision strength at Te=70000K
199-205 E7.3 --- ECS(80000) Effective collision strength at Te=80000K
207-213 E7.3 --- ECS(90000) Effective collision strength at Te=90000K
215-221 E7.3 --- ECS(100000) Effective collision strength at Te=100000K
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Acknowledgements:
Cathy Ramsbottom, c.ramsbottom(at)qub.ac.uk
(End) Patricia Vannier [CDS] 28-Sep-2007