J/ApJS/185/477 N K-shell photoabsorption (Garcia+, 2009)
Nitrogen K-shell photoabsorption.
Garcia J., Kallman T.R., Witthoeft M., Behar E., Mendoza C., Palmeri P.,
Quinet P., Bautista M.A., Klapisch M.
<Astrophys. J. Suppl. Ser., 185, 477-485 (2009)>
=2009ApJS..185..477G 2009ApJS..185..477G
ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes - line: formation - X-rays: general
Abstract:
Reliable atomic data have been computed for the spectral modeling of
the nitrogen K lines, which may lead to useful astrophysical
diagnostics. Data sets comprise valence and K-vacancy level energies,
wavelengths, Einstein A-coefficients, radiative and Auger widths, and
K-edge photoionization cross sections. An important issue is the lack
of measurements that are usually employed to fine-tune calculations so
as to attain spectroscopic accuracy. In order to estimate data
quality, several atomic structure codes are used and extensive
comparisons with previous theoretical data have been carried out. In
the calculation of K photoabsorption with the Breit-Pauli R-matrix
method, both radiation and Auger dampings, which cause the smearing of
the K edge, are taken into account. This work is part of a wider
project to compute atomic data in the X-ray regime to be included in
the database of the popular xstar modeling code.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table10.dat 89 201 Valence and Auger levels for nitrogen ions
table11.dat 49 668 Radiative K-transition data nitrogen ions
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See also:
J/A+A/410/359 : Radiative and Auger decay for Fe II-Fe IX (Palmeri+, 2003)
Byte-by-byte Description of file: table10.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- N [1/7] Ion electron occupancy
6- 10 I5 --- i [1/50] Level index
11- 15 I5 --- 2S+1 [1/6] Spin multiplicity
16- 20 I5 --- L [0/2] Total orbital angular momentum quantum
number
21- 25 I5 --- 2J [0/7] The 2*(Total angular momentum quantum
number)
31- 55 A25 --- Config Electron configuration assignment
56- 65 F10.4 eV Energy Level energy
66- 77 E12.2 s-1 Ar Level radiative width
78- 89 E12.2 s-1 Aa Level Auger width
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Byte-by-byte Description of file: table11.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- N [1/7] Ion electron occupancy
6- 10 I5 --- j [3/50] Upper level index
11- 15 I5 --- i [1/20] Lower level index
16- 25 F10.4 0.1nm lambda Transition wavelength
26- 37 E12.2 s-1 Aji Transition probability
38- 49 E12.2 --- gf Weighted oscillator strength
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 22-Mar-2010