J/MNRAS/424/2461 ScII effective collision strengths (Grieve+, 2012)
Electron-impact excitation of ScII: collision strengths and effective collision
strengths for fine-structure transitions.
Grieve M.F.R., Ramsbottom C.A.
<Mon. Not. R. Astron. Soc., 424, 2461-2467 (2012)>
=2012MNRAS.424.2461G 2012MNRAS.424.2461G
ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes - plasmas - scattering
Abstract:
Accurate fine-structure atomic data for the Fe-peak elements are
essential for interpreting astronomical spectra. There is a severe
paucity of data available for ScII, highlighted by the fact that no
collision strengths are readily available for this ion. We present
electron-impact excitation collision strengths and Maxwellian averaged
effective collision strengths for ScII. The collision strengths
were calculated for all 3916 transitions amongst 89 jj levels (arising
from the 3d4s, 3d2, 4s2, 3d4p, 4s4p, 3d5s, 3d4d, 3d5p, 4p2 and
3d4f configurations), resulting in a 944 coupled channel problem. The
R-matrix package RMATRXII was utilized, along with the transformation
code fine and the external region code pstgf, to calculate the
collision strengths for a range of incident electron energies in the 0
to 8.3 Rydberg region. Maxwellian averaged effective collision
strengths were then produced for 27 temperatures lying within the
astrophysically significant range of 30 to 105K.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 40 89 Level configurations
table6.dat 248 3916 Maxwellian averaged effective collision strengths
for 27 temperatures ranging from 30 to 105K
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See also:
J/A+AS/125/543 : Effective collision strengths for Mg VI (Ramsbottom+ 1997)
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+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+A/429/1117 : Fe XIII effective collision strengths (Aggarwal+, 2005)
J/A+A/430/725 : N II effective collision strengths (Hudson+, 2005)
J/A+A/432/731 : Effective collision strengths for C II (Wilson+, 2005)
J/A+A/436/1131 : Effective collision strengths for Al III (Hudson+ 2005)
J/A+A/439/1215 : Effective collision strengths for Fe X trans. (Aggarwal+ 2005)
J/ApJS/166/634 : OIV Effective collision strength (Tayal+, 2006)
J/A+A/452/1113 : S V effective collision strengths (Hudson+, 2006)
J/A+A/486/629 : Effective collision strengths for C II (Tayal, 2008)
J/A+A/488/365 : NiXIX effective collision strengths (Aggarwal+, 2008)
J/A+A/493/697 : Effective collision strength of Mg IX (Hudson, 2009)
J/A+A/494/729 : Effective collision strength of Mg V (Hudson+, 2009)
J/A+A/510/A79 : Effective collision strengths for K II (Tayal+, 2010)
J/A+A/513/A55 : Effective collision strengths of Ni II (Cassidy+, 2010)
J/A+A/524/A35 : Effective collision strengths of CrII (Wasson+, 2010)
J/A+A/537/A12 : Effective collision strength of Ni XVII (Hudson+, 2012)
J/ApJ/738/5 : Effective collision strengths in NiII (Cassidy+, 2011)
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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 --- Index [1/89] Index number
10- 17 F8.2 cm-1 E Level energy
18 A1 --- --- [0]
24- 25 I2 --- 2J+1 [1/13] Composite angular momentum quantum number
26- 27 A2 --- --- [.0]
33- 40 A8 --- Level level configuration and symmetry
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- i [1/88] i lower level index
4- 5 I2 --- j [2/89] j upper level index
7- 14 E8.3 --- ECS30 Effective collision strength for T=30K
16- 23 E8.3 --- ECS100 Effective collision strength for T=100K
25- 32 E8.3 --- ECS300 Effective collision strength for T=300K
34- 41 E8.3 --- ECS500 Effective collision strength for T=500
43- 50 E8.3 --- ECS750 Effective collision strength for T=750K
52- 59 E8.3 --- ECS1k Effective collision strength for T=1000K
61- 68 E8.3 --- ECS1.3k Effective collision strength for T=1300K
70- 77 E8.3 --- ECS1.5k Effective collision strength for T=1500K
79- 86 E8.3 --- ECS1.8k Effective collision strength for T=1800K
88- 95 E8.3 --- ECS2k Effective collision strength for T=2000K
97-104 E8.3 --- ECS2.3k Effective collision strength for T=2300K
106-113 E8.3 --- ECS2.5k Effective collision strength for T=2500K
115-122 E8.3 --- ECS5k Effective collision strength for T=5000K
124-131 E8.3 --- ECS7.5k Effective collision strength for T=7500K
133-140 E8.3 --- ECS10k Effective collision strength for T=10000K
142-149 E8.3 --- ECS13k Effective collision strength for T=13000K
151-158 E8.3 --- ECS15k Effective collision strength for T=15000K
160-167 E8.3 --- ECS18k Effective collision strength for T=18000K
169-176 E8.3 --- ECS20k Effective collision strength for T=20000K
178-185 E8.3 --- ECS30k Effective collision strength for T=30000K
187-194 E8.3 --- ECS40k Effective collision strength for T=40000K
196-203 E8.3 --- ECS50k Effective collision strength for T=50000K
205-212 E8.3 --- ECS60k Effective collision strength for T=60000K
214-221 E8.3 --- ECS70k Effective collision strength for T=70000K
223-230 E8.3 --- ECS80k Effective collision strength for T=80000K
232-239 E8.3 --- ECS90k Effective collision strength for T=90000K
241-248 E8.3 --- ECS100k Effective collision strength for T=100000K
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History:
* 10-May-2013: from electronic version of the journal
* 15-Sep-2013: added table2 (levels), from author
(End) Patricia Vannier, Francois Ochsenbein [CDS] 10-May-2013