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J/A+A/524/A35       Effective collision strengths of CrII   (Wasson+, 2010)

Electron-impact excitation of Cr II. A theoretical calculation of collision and effective collision strengths for forbidden transitions. Wasson I.R., Ramsbottom C.A., Norrington P.H. <Astron. Astrophys. 524, A35 (2010)> =2010A&A...524A..35W
ADC_Keywords: Atomic physics Keywords: atomic data - atomic processes - methods:numerical - scattering - plasmas Abstract: Absorption or emission lines of Cr II are observed in a wide variety of astrophysical spectra and accurate atomic data are urgently needed to interpret these lines. Many of these data are impossible to measure experimentally and a full theoretical treatment is the only means by which these data can be obtained. Description: This table presents the computed effective collision strengths for all transitions among the lowest 28 fine structure levels of Cr II. The 18 temperatures considered ranging from 2000K to 100000K. The index value for each level have been assigned in energy order from the lowest 28 fine structure levels corresponding to configurations 3d5 and 3d4 4s. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 65 37 Energy differences from the Ground State for the lowest 28 3d5 and 3d44s target states, and 9 other 3d44p target states, per model table4.dat 149 378 Effective collision strengths
See also: J/A+AS/103/273 : IRON Project II. C-like ions (Lennon+ 1994) J/A+AS/125/543 : Effective collision strengths for Mg VI (Ramsbottom+ 1997) 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/A+A/452/1113 : S V effective collision strengths (Hudson+, 2006) J/ApJS/166/634 : OIV Effective collision strength (Tayal+, 2006) J/A+A/475/765 : Fine structure forbidden lines in FeII (Ramsbottom+, 2007) 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/511/A68 : Transitions of CrII (Gurell+, 2010) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 7 A7 --- Config Configuration 9- 17 A9 --- Term Term 19- 25 F7.5 Ry ENIST NIST energy difference from the ground state (1) 27- 33 F7.5 Ry EM3 M3 (3 config) energy difference from the ground state (2) 35- 41 F7.5 Ry EM6 M6 (6 config) energy difference from the ground state (2) 43- 49 F7.5 Ry EM10 M10 (10 config) energy difference from the ground state (2) 51- 57 F7.5 Ry EM14 M14 (14 config) energy difference from the ground state (2) 59- 65 F7.5 Ry EM18 M18 (18 config) energy difference from the ground state (2)
Note (1): NIST : Atomic Spectra Database, Note (2): See table2 of the paper for more details.
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 2 I2 --- i [1,27] i level of transition 3 A1 --- --- [-] 4- 5 I2 --- j [2,28] j level of transition 7- 13 E7.3 --- ECS2k Effective collision strength at Te=2000K 15- 21 E7.3 --- ECS2.3k Effective collision strength at Te=2300K 23- 29 E7.3 --- ECS2.5k Effective collision strength at Te=2500K 31- 37 E7.3 --- ECS5k Effective collision strength at Te=5000K 39- 45 E7.3 --- ECS7.5k Effective collision strength at Te=7500K 47- 53 E7.3 --- ECS10k Effective collision strength at Te=10000K 55- 61 E7.3 --- ECS13k Effective collision strength at Te=13000K 63- 69 E7.3 --- ECS15k Effective collision strength at Te=15000K 71- 77 E7.3 --- ECS18k Effective collision strength at Te=18000K 79- 85 E7.3 --- ECS20k Effective collision strength at Te=20000K 87- 93 E7.3 --- ECS30k Effective collision strength at Te=30000K 95-101 E7.3 --- ECS40k Effective collision strength at Te=40000K 103-109 E7.3 --- ECS50k Effective collision strength at Te=50000K 111-117 E7.3 --- ECS60k Effective collision strength at Te=60000K 119-125 E7.3 --- ECS70k Effective collision strength at Te=70000K 127-133 E7.3 --- ECS80k Effective collision strength at Te=80000K 135-141 E7.3 --- ECS90k Effective collision strength at Te=90000K 143-149 E7.3 --- ECS100k Effective collision strength at Te=100000K
Acknowledgements: Ian Wasson, iwasson01(at)
(End) Patricia Vannier [CDS] 19-Nov-2010
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