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J/A+A/513/A55       Effective collision strengths of Ni II   (Cassidy+, 2010)

Electron-impact excitation of Ni II. Collision strengths and effective collision strengths for low-lying fine-structure forbidden transitions. Cassidy C.M., Ramsbottom, C.A., Scott M.P., Burke, P.G. <Astron. Astrophys. 513, A55 (2010)> =2010A&A...513A..55C
ADC_Keywords: Atomic physics Keywords: atomic data - atomic processes - scattering - plasmas - methods: numerical - binaries: symbiotic Abstract: Considerable demand exists for electron excitation data for Ni II, since lines from this abundant ion are observed in a wide variety of laboratory and astrophysical spectra. The accurate theoretical determination of these data can present a significant challenge however, due to complications arising from the presence of an open 3d-shell in the description of the target ion. Description: Table 2 presents effective collision strengths for the 153 forbidden fine-structure transitions between the energetically lowest 18 levels of Ni II. The 27 temperatures considered are listed at the top of the table in three rows each consisting of 10 columns. The effective collision strengths are subsequently listed - the first column labels the transition and the remaining columns list the effective collision strength for each temperature. The index values for each level have been assigned in Table 1 to denote the particular transition. The CS.tar file contains the collision strength data for each of the 153 transitions. These are stored in individual files each composed of two columns. The first column corresponds to the incident electron energy in Rydbergs and the second corresponds to the associated collision strength. The files are labelled by transition using the same indexing assigned in Table 1. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 36 18 Lowest 18 fine-structure levels associated with the collision data table2.dat 221 153 Effective collision strengths for low-lying forbidden transitions in Ni II csdata/* 30 153 *Collision strength data for each of the 153 transitions
Note on csdata/* : Files labelled file00II.00JJ where II is the i level of transition and JJ is the j level of transition.
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Term Term 18- 20 F3.1 --- J J value 26- 30 I5 cm-1 Enist Observed energy value from NIST databank (1) 35- 36 I02 --- Index Index
Note (1): NIST: http://www.nist.gov/physlab/data/asd.cfm
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 2 I02 --- i [1,17] i level of transition 3 A1 --- --- [-] 4- 5 I02 --- j [2,18] 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) 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(10k) Effective collision strength at Te=10000K 127-133 E7.3 --- ECS(13k) Effective collision strength at Te=13000K 135-141 E7.3 --- ECS(15k) Effective collision strength at Te=15000K 143-149 E7.3 --- ECS(18k) Effective collision strength at Te=18000K 151-157 E7.3 --- ECS(20k) Effective collision strength at Te=20000K 159-165 E7.3 --- ECS(30k) Effective collision strength at Te=30000K 167-173 E7.3 --- ECS(40k) Effective collision strength at Te=40000K 175-181 E7.3 --- ECS(50k) Effective collision strength at Te=50000K 183-189 E7.3 --- ECS(60k) Effective collision strength at Te=60000K 191-197 E7.3 --- ECS(70k) Effective collision strength at Te=70000K 199-205 E7.3 --- ECS(80k) Effective collision strength at Te=80000K 207-213 E7.3 --- ECS(90k) Effective collision strength at Te=90000K 215-221 E7.3 --- ECS(100k) Effective collision strength at Te=100000K
Byte-by-byte Description of file: csdata/*
Bytes Format Units Label Explanations
4- 15 E12.8 Ry IEE Incident electron energy 19- 30 E12.8 --- CS Associated collision strength
Acknowledgements: Clara Cassidy, ccassidy15(at)qub.ac.uk, Queen's University of Belfast, Northern Ireland
(End) Clara Cassidy [Queen's Univ. Belfast], Patricia Vannier [CDS] 30-Apr-2010
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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