J/ApJ/738/5 Effective collision strengths in NiII (Cassidy+, 2011)
Electron-impact excitation of Ni II: effective collision strengths for optically
allowed fine-structure transitions.
Cassidy C.M., Ramsbottom C.A., Scott M.P.
<Astrophys. J., 738, 5 (2011)>
=2011ApJ...738....5C 2011ApJ...738....5C (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes - methods: numerical -
plasmas - scattering
Abstract:
In this paper, we present collision strengths and Maxwellian averaged
effective collision strengths for the electron-impact excitation of
NiII. Attention is expressly concentrated on the optically allowed
fine-structure transitions between the 3d9, 3d84s, and 3d74s2
even parity levels and the 3d84p and 3d74s 4p odd parity levels.
The parallel RMATRXII R-matrix package has been recently extended to
allow for the inclusion of relativistic fine-structure effects. This
suite of codes has been utilized in conjunction with the parallel
PSTGF and PSTGICF programs in order to compute converged total
collision strengths for the allowed transitions with which this study
is concerned. All 113 LS terms identified with the 3d9, 3d84s,
3d74s2, 3d84p, and 3d74s 4p basis configurations were included
in the target wavefunction representation, giving rise to a
sophisticated 295 jj-level, 1930 coupled channel scattering complex.
Maxwellian averaged effective collision strengths have been computed
at 30 individual electron temperatures ranging from 30 to 1000000K.
This range comfortably encompasses all temperatures significant to
astrophysical and plasma applications.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 22 295 Target states included in the present calculation
table3.dat 277 2436 Effective collision strengths for fine-structure
allowed transitions in NiII
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See also:
J/A+A/513/A55 : Effective collision strengths of Ni II (Cassidy+, 2010)
J/A+A/420/763 : Electron impact excitation of NiII (Bautista+, 2004)
J/A+AS/119/99 : [Ni I] + [Ni II] transition probabilities (Quinet+, 1996)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Index [1/295] Level index
5- 13 A9 --- Config Level configuration (
15- 19 A5 --- Term Term in configuation
21- 22 I2 --- 2J 2x J orbital quantum number
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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- 3 I3 --- i [1/150] Lower transition level
5- 7 I3 --- j [19/295] Upper transition level
9- 16 E8.3 --- T30 Effective collision strength at Te=30K
18- 25 E8.3 --- T100 Effective collision strength at Te=100K
27- 34 E8.3 --- T300 Effective collision strength at Te=300K
36- 43 E8.3 --- T500 Effective collision strength at Te=500K
45- 52 E8.3 --- T750 Effective collision strength at Te=750K
54- 61 E8.3 --- T1000 Effective collision strength at Te=1000K
63- 70 E8.3 --- T1300 Effective collision strength at Te=1300K
72- 79 E8.3 --- T1500 Effective collision strength at Te=1500K
81- 88 E8.3 --- T1800 Effective collision strength at Te=1800K
90- 97 E8.3 --- T2000 Effective collision strength at Te=2000K
99-106 E8.3 --- T2300 Effective collision strength at Te=2300K
108-115 E8.3 --- T2500 Effective collision strength at Te=2500K
117-124 E8.3 --- T5000 Effective collision strength at Te=5000K
126-133 E8.3 --- T7500 Effective collision strength at Te=7500K
135-142 E8.3 --- T10k Effective collision strength at Te=10000K
144-151 E8.3 --- T13k Effective collision strength at Te=13000K
153-160 E8.3 --- T15k Effective collision strength at Te=15000K
162-169 E8.3 --- T18k Effective collision strength at Te=18000K
171-178 E8.3 --- T20k Effective collision strength at Te=20000K
180-187 E8.3 --- T30k Effective collision strength at Te=30000K
189-196 E8.3 --- T40k Effective collision strength at Te=40000K
198-205 E8.3 --- T50k Effective collision strength at Te=50000K
207-214 E8.3 --- T60k Effective collision strength at Te=60000K
216-223 E8.3 --- T70k Effective collision strength at Te=70000K
225-232 E8.3 --- T80k Effective collision strength at Te=80000K
234-241 E8.3 --- T90k Effective collision strength at Te=90000K
243-250 E8.3 --- T100k Effective collision strength at Te=100000K
252-259 E8.3 --- T150k Effective collision strength at Te=150000K
261-268 E8.3 --- T175k Effective collision strength at Te=175000K
270-277 E8.3 --- T1M Effective collision strength at Te=1000000K
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 11-Jan-2013