NITROGEN K-SHELL PHOTOABSORPTION

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 s...

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Bibliographic Details
Published inThe Astrophysical journal. Supplement series Vol. 185; no. 2
Main Authors GarcIa, J., Kallman, T. R., Witthoeft, M., Behar, E., Mendoza, C., Palmeri, P., Quinet, P., Bautista, M.A., Klapisch, M.
Format Journal Article
LanguageEnglish
Published United States 01.12.2009
Subjects
ASTROPHYSICS
ATOMIC AND MOLECULAR PHYSICS
CROSS SECTIONS
K SHELL
NITROGEN
PHOTOIONIZATION
R MATRIX
SIMULATION
X RADIATION
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Summary: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.
ISSN:0067-0049
1538-4365
DOI:10.1088/0067-0049/185/2/477;COUNTRYOFINPUT:INTERNATIONALATOMICENERGYAGENCY(IAEA)