J/A+A/567/A18 Ni XV electron collisional excitation (Del Zanna+, 2014)
Atomic data for astrophysics: Ni XV.
Del Zanna G., Storey P.J., Mason, H.E.
<Astron. Astrophys. 567, A18 (2014)>
=2014A&A...567A..18D 2014A&A...567A..18D
ADC_Keywords: Atomic physics
Keywords: atomic data - line: identification - techniques: spectroscopic -
Sun: corona
Abstract:
We present the first R-matrix scattering calculation for electron
collisional excitation of NiXV. The large-scale target includes
configurations up to n=4. The calculations were carried out using the
intermediate-coupling frame transformation method (ICFT). Significant
enhancements in the collision strengths, compared to previous
distorted wave (DW) calculations, are found for several cases, in
particular the forbidden lines within the ground configuration and the
3s2 3p 4s levels. We provide a complete set of rates and a list of
strongest lines that are observable in astrophysical plasmas. Previous
identifications are reviewed, and a few new ones suggested. The new
data can be used to accurately measure electron densities for
high-temperature (3MK) plasmas, and the nickel abundance.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 51 483 Level energies of the RM4 calculation
table2.dat 117 116403 Transition probabilities and thermally averaged
collision strengths for the RM4 calculation
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See also:
J/A+AS/119/99 : [NiI] + [NiII] transition probabilities (Quinet+, 1996)
J/A+A/365/268 : IRON Project. XLVII. Ni III (Bautista, 2001)
J/A+A/460/959 : Ni XIX radiative and excitation rates (Aggarwal+, 2006)
J/A+A/475/393 : NiXI radiative and excitation rates (Aggarwal+, 2007)
J/A+A/488/365 : NiXIX effective collision strengths (Aggarwal+, 2008)
J/A+A/488/1155 : Ni XXV energy levels and radiative rates (Duan+, 2008)
J/A+A/513/A55 : Effective collision strengths of Ni II (Cassidy+, 2010)
J/A+A/537/A12 : Effective collision strength of Ni XVII (Hudson+, 2012)
J/A+A/566/A123 : Ni XI electron collisional excitation (Del Zanna+, 2014)
J/A+A/541/A90 : FeX soft X-ray lines (Del Zanna+, 2012)
J/A+A/543/A139 : FeXII soft X-ray lines (Del Zanna+, 2012)
J/A+A/543/A144 : FeXIII soft X-ray lines (Del Zanna+, 2012)
J/A+A/549/A42 : FeXI soft X-ray lines (Del Zanna+, 2013)
J/A+A/565/A77 : Atomic data for FeIX (Del Zanna+, 2014)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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3- 5 I3 --- Index [1/483] Level index
7- 24 A18 --- Level Level description
25 A1 --- --- [(]
26 I1 --- 2S+1 [1/5] Spin 2S+1 multiplicity
27 A1 --- --- [)]
28 I1 --- L [0/6] L value
29 A1 --- --- [(]
30- 33 F4.1 --- J [0/6] J value
34 A1 --- --- [)]
43- 51 F9.1 cm-1 E Level energy (ab initio)
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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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2- 4 I3 --- i [2/483] Upper level index of the transition
6- 8 I3 --- j [1/482] Lower level index of the transition
10- 17 E8.3 s-1 A Einstein A coefficient
19- 26 E8.3 --- CS1 Averaged collision strength at T=4.50x104K
28- 35 E8.3 --- CS2 Averaged collision strength at T=1.12x105K
37- 44 E8.3 --- CS3 Averaged collision strength at T=2.25x105K
46- 53 E8.3 --- CS4 Averaged collision strength at T=4.50x105K
55- 62 E8.3 --- CS5 Averaged collision strength at T=1.12x106K
64- 71 E8.3 --- CS6 Averaged collision strength at T=2.25x106K
73- 80 E8.3 --- CS7 Averaged collision strength at T=4.50x106K
82- 89 E8.3 --- CS8 Averaged collision strength at T=1.12x107K
91- 98 E8.3 --- CS9 Averaged collision strength at T=2.25x107K
100-107 E8.3 --- CS10 Averaged collision strength at T=4.50x107K
109-117 E9.3 --- Elim High-energy limit
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Acknowledgements:
Giulio Del Zanna, gdelzanna(at)spd.aas.org
(End) Patricia Vannier [CDS] 23-Jun-2014