J/A+A/444/305 A-values + oscillator strength of Ca XIII (Landi+, 2005)
Atomic data and spectral line intensities for Ca XIII.
Landi E., Bhatia A.K.
<Astron. Astrophys. 444, 305 (2005)>
=2005A&A...444..305L 2005A&A...444..305L
ADC_Keywords: Atomic physics ; Sun ; Ultraviolet
Keywords: Sun: corona - Sun: UV radiation - atomic data
Abstract:
Electron impact collision strengths, energy levels, oscillator
strengths and spontaneous radiative decay rates are calculated for Ca
XIII. The configurations used are 2s2.2p4, 2s.2p5, 2p6, 2s2.2p3.3s,
2s2.2p3.3p and 2s2.2p3.3d giving rise to 86 fine-structure levels in
intermediate coupling. Collision strengths are calculated at five
incident energies (40, 80, 120, 160 and 200Ry) in the distorted wave
approximation. Excitation rate coefficients are calculated as a
function of electron temperature by assuming a Maxwellian electron
velocity distribution. Using the excitation rate coefficients and the
radiative transition rates, statistical equilibrium equations for
level populations are solved at electron densities covering the range
of 108-1014cm^-3 at an electron temperature of logTe(K)=6.5,
corresponding to maximum abundance of Ca XIII. Relative and absolute
spectral line intensities are calculated, and their diagnostic
relevance is discussed. This dataset will be made available in the
next version of the CHIANTI database.
Description:
Atomic data, energy levels, radiative transition rate and
electron-ion collision rate coefficients have been calculated
for Ca XIII using the distorted wave approximation. They have
been compared with data available in the literature and with
observations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 60 86 Atomic data and theoretical and experimental
energy levels
table2.dat 76 3655 Oscillator strengths, A values and collision
strengths for all transitions
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See also:
J/A+A/434/365 : A-values + oscillator strength of O-like ions (Landi+, 2005)
J/A+A/426/717 : Oscillator strengths for ClII lines (Tayal+, 2004)
J/A+A/389/716 : Oscillator strengths for Li-like ions (Nahar, 2002)
J/PAZh/28/41 : Eu III oscillator strengths (Masonkina+, 2002)
J/ApJS/121/591 : Oscillator Strengths for SIV (Coutinho+, 1999)
J/A+AS/130/541 : Co II oscillator strengths (Raassen+ 1998)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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2- 3 I2 --- Index Index of level
5- 17 A13 --- Conf Configuration
21 I1 --- S Total spin momentum S
22 A1 --- L Total orbital angular momentum L (in letters)
23 I1 --- J [0/9]? Total angular momentum J
28- 34 I7 cm-1 E24 Calculated energy - 24 configuration model
39- 45 I7 cm-1 E6 Calculated energy - 6 configuration model
49- 55 I7 cm-1 Eobs ? Observed energy from the literature
60 A1 --- Ref [A-F] Source of observed energy (1)
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Note (1): Sources are numbered as follows:
A = Acton et al., 1985ApJ...291..865A 1985ApJ...291..865A
C = Feldman et al., 2000ApJ...544..508F 2000ApJ...544..508F
D = Doschek G.A., Feldman U., Cohen L. 1973, J. Opt. Soc. Am., 63, 1463
E = Edlen B. 1983, Physica Scripta, 28, 51
F = Fawcett & Hayes 1975MNRAS.170..185F 1975MNRAS.170..185F
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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- 3 I2 --- Low Lower level in the transition
5- 6 I2 --- Up Upper level in the transition
8- 16 E9.3 --- gf Weighted Oscillator Strength
18- 26 E9.3 s-1 Avalue Einstein coefficient
28- 36 E9.3 --- Omega40 Collision strength (E= 40 Ry)
38- 46 E9.3 --- Omega80 Collision strength (E= 80 Ry)
48- 56 E9.3 --- Omega120 Collision strength (E=120 Ry)
58- 66 E9.3 --- Omega160 Collision strength (E=160 Ry)
68- 76 E9.3 --- Omega200 Collision strength (E=200 Ry)
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Acknowledgements: Enrico Landi, landi(at)poppeo.nrl.navy.mil
(End) Patricia Vannier [CDS] 18-Nov-2005