J/A+A/430/725 N II effective collision strengths (Hudson+, 2005)
Effective collision strengths for fine-structure transitions for the electron
impact excitation of N II.
Hudson C.E., Bell K.L.
<Astron. Astrophys. 430, 725 (2005)>
=2005A&A...430..725H 2005A&A...430..725H
ADC_Keywords: Atomic physics
Keywords: atomic processes - line: formation - methods: analytical
Description:
The effective collision strengths are presented in this table for
all transitions among the lowest 41 fine-structure levels belonging to
the 2s(2)2p(2), 2s2p(3) and 2s(2)2p3l(l=s,p,d) configurations of N II.
These have been calculated using the R-matrix method.
Each fine-structure level is assigned an index number in Table 1 of
the manuscript ranging from 1 to 41. These index values are used here
in Table 2 to refer to particular transitions, eg. Index 1-3 denotes
the transition 2s(2)2p(2)3PE(J=0)-2s(2)2p(2)3PE(J=2). The effective
collision strengths for each transition are presented in rows for a
number of electron temperatures ranging from log10(T)=2.00 to
log10(T)=5.50.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 44 41 Energy levels in Rydbergs for the 23 LS target
states included in the calculation, relative to
the 2s22p2 3Pe ground state.
table2.dat 113 805 Effective collision strengths for N II
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See also:
J/A+A/436/1131 : Al III effective collision strengths (Hudson+ 2005)
J/A+A/399/799 : Fe XI trans. effective collision strengths (Aggarwal+, 2003)
J/A+A/410/349 : Effective collision strengths in Fe XV (Aggarwal+, 2003)
J/A+A/418/363 : Effective collision strengths for Cl II (Tayal+, 2004)
J/A+A/418/1171 : FeXVIII-FeXXIII effective collision strengths (Bautista+ 2004)
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)
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- LS LS state
20- 25 F6.4 Ry E Current LS Energy (experimental values of NIST)
27- 32 F6.4 Ry Eobs Observed LS Energy
34- 39 F6.4 Ry Delta Difference between calculated and observed
energies
41 I1 ---- J J-value arising from each LS state
43- 44 I2 --- Index J level index assigned to the fine structure
level
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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 --- i1 Index number of lower transition state
3 A1 --- --- [-]
4- 5 I2 --- i2 Index number of upper transition state
7- 14 E8.3 --- ECS2.00 Effective collision at log(T)=2.00
16- 23 E8.3 --- ECS2.25 Effective collision at log(T)=2.25
25- 32 E8.3 --- ECS2.50 Effective collision at log(T)=2.50
34- 41 E8.3 --- ECS2.75 Effective collision at log(T)=2.75
43- 50 E8.3 --- ECS3.00 Effective collision at log(T)=3.00
52- 59 E8.3 --- ECS3.25 Effective collision at log(T)=3.25
61- 68 E8.3 --- ECS3.50 Effective collision at log(T)=3.50
70- 77 E8.3 --- ECS3.75 Effective collision at log(T)=3.75
79- 86 E8.3 --- ECS4.00 Effective collision at log(T)=4.00
88- 95 E8.3 --- ECS4.50 Effective collision at log(T)=4.50
97-104 E8.3 --- ECS5.00 Effective collision at log(T)=5.00
106-113 E8.3 --- ECS5.50 Effective collision at log(T)=5.50
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Acknowledgements: Claire Hudson, c.hudson(at)am.qub.ac.uk
(End) Claire Hudson [Queens Univ. Belfast], Patricia Vannier [CDS] 05-Nov-2004