”NORAD-ATOMIC-DATA for Radiative Processes at the Ohio State University” Sultana N. Nahar Astronomy Dept, The Ohio State University Columbus, Ohio, USA ”Symposium on VAMDC-USA” The 8th ICAMDATA Satellite Meeting NIST, Gaithersburg, October 5, 2012 *Support: NSF, DOE, Ohio Supercomputer Center 1
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NORAD-ATOMIC-DATA for Radiative Processes at the Ohio ... · NORAD-ATOMIC-DATA The on-line database NORAD-Atomic-Data con-tains high accuracy data for radiative atomic pro-cesses,
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”NORAD-ATOMIC-DATA for RadiativeProcesses at the Ohio State University”
Sultana N. NaharAstronomy Dept, The Ohio State University
Columbus, Ohio, USA
”Symposium on VAMDC-USA”
The 8thICAMDATA Satellite Meeting
NIST, Gaithersburg, October 5, 2012
*Support: NSF, DOE, Ohio Supercomputer Center
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NORAD-ATOMIC-DATA
• The on-line database NORAD-Atomic-Data con-tains high accuracy data for radiative atomic pro-cesses, such as photoionization, electron-ion recom-bination, radiative transitions, lifetimes, etc.
• The results are mainly from the Rmatrix calcula-tions by Nahar et al.
• Significant part of the data corresponds to newand improved results over those under the interna-tional Opacity Project and the Iron Project.
• Contains large sets of energy levels, photoioniza-tion cross sections, recombination cross sections andrate coefficients, oscillator strengths and other tran-sition parameters. These consider large number ofbound levels, typically going up to n=10 for com-plete modeling of astrophysical objects
• All files are in standard ascii character format foruse in models and diagnostics of astrophysical andlaboratory plasmas
• Spectroscopic information for all levels and tran-sitions are provided. They are usually given in theenergy tables and the numerical codes connect themto the transitions and levels in the cross section andrate coefficient files
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• Present contents are for over 85 atomic species ofelements H, He, C, N, O, F, Ne, etc going up to Ni
• The x-ray Kα transition of elements, particularlyof heavier ones, have been of great interest for var-ious astronomical, biomedical, fusion plasma appli-cation There are 112 K-L transitions possible foreach element. A new addition to NORAD-Atomic-Data will be these transitions for a large number ofelements
• NORAD-Atomic-Data can be accessed from vari-ous database pages. Ex.• CfA-Harvard-http://www.cfa.harvard.edu/amp/ampdata/databases.html• CFADC of Oak Ridge National Lab-http://www-cfadc.phy.ornl.gov/databases.html• Internationl Atomic Energy Agency-http://www-amdis.iaea.org/databases.php