Extended MCDHF Calculations of Energy Levels and Transition Data for N I

Li, M. C.Huizhou Univ, Sch Elect Informat & Elect Engn, Huizhou 516007, Peoples R China. (author)

Accurate and extensive atomic data are essential for spectroscopic analyses of stellar atmospheres and other astronomical objects. We present energy levels, lifetimes, and transition probabilities for neutral nitrogen, the sixth most abundant element in the cosmos. The calculations employ the fully relativistic multiconfiguration Dirac-Hartree-Fock and relativistic configuration interaction methods, and span the 103 lowest states up to and including 2s(2)2p(2)5s. Our theoretical energies are in excellent agreement with the experimental data, with an average relative difference of 0.07%. In addition, our transition probabilities are in good agreement with available experimental and theoretical data. We further verify the agreement of our data with experimental results via a reanalysis of the solar nitrogen abundance, with the results from the Babushkin and Coulomb gauges consistent to 2% or 0.01 dex. We estimated the uncertainties of the computed transition data based on a statistical analysis of the differences between the transition rates in the Babushkin and Coulomb gauges. Out of the 1701 computed electric dipole transitions in this work, 83 (536) are associated with uncertainties smaller than 5% (10%).

Li, W.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China. (author)
Jönsson, PerMalmö universitet,Institutionen för materialvetenskap och tillämpad matematik (MTM),Malmö Univ, Dept Mat Sci & Appl Math, SE-20506 Malmö, Sweden.(Swepub:mau)tspejo (author)
Amarsi, AnishUppsala universitet,Teoretisk astrofysik(Swepub:uu)aniam456 (author)
Grumer, JonUppsala universitet,Teoretisk astrofysik(Swepub:uu)jongr291 (author)
Huizhou Univ, Sch Elect Informat & Elect Engn, Huizhou 516007, Peoples R China.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China. (creator_code:org_t)

In:Astrophysical Journal Supplement Series: Institute of Physics Publishing (IOPP)265:10067-00491538-4365

By the author/editor: Li, M. C.; Li, W.; Jönsson, Per; Amarsi, Anish; Grumer, Jon

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Atom and Molecul ...

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Astronomy Astrop ...

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