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Title: PLASMA DIAGNOSTIC POTENTIAL OF 2p4f IN N{sup +}—ACCURATE WAVELENGTHS AND OSCILLATOR STRENGTHS

Abstract

Radiative emission lines from nitrogen and its ions are often observed in nebula spectra, where the N{sup 2+} abundance can be inferred from lines of the 2p4f configuration. In addition, intensity ratios between lines of the 2p3p-2p3s and 2p4f-2p3d transition arrays can serve as temperature diagnostics. To aid abundance determinations and plasma diagnostics, wavelengths and oscillator strengths were calculated with high precision for electric dipole (E1) transitions from levels in the 2p4f configuration of N{sup +}. Electron correlation and relativistic effects, including the Breit interaction, were systematically taken into account within the framework of the multiconfiguration Dirac-Hartree-Fock method. Except for the 2p4f-2p4d transitions with quite large wavelengths and the two-electron-one-photon 2p4f-2s2p {sup 3} transitions, the uncertainties of the present calculations were controlled to within 3% and 5% for wavelengths and oscillator strengths, respectively. We also compared our results with other theoretical and experimental values when available. Discrepancies were found between our calculations and previous calculations due to the neglect of relativistic effects in the latter.

Authors:
 [1]; ;  [2];  [3]
  1. School of Physics Science and Nuclear Energy Engineering, Beihang University, Beijing 100191 (China)
  2. Data Center for High Energy Density Physics, Institute of Applied Physics and Computational Mathematics, P.O. Box 8009, Beijing 100088 (China)
  3. Materials Science and Applied Mathematics, Malmö University, SE-20506 Malmö (Sweden)
Publication Date:
OSTI Identifier:
22521379
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 801; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COMPARATIVE EVALUATIONS; E1-TRANSITIONS; ELECTRIC DIPOLES; ELECTRON CORRELATION; ELECTRONS; EMISSION SPECTRA; HARTREE-FOCK METHOD; NEBULAE; NITROGEN; NITROGEN IONS; OSCILLATOR STRENGTHS; PHOTONS; PLASMA DIAGNOSTICS; RELATIVISTIC RANGE; WAVELENGTHS

Citation Formats

Shen, Xiaozhi, Li, Jiguang, Wang, Jianguo, and Jönsson, Per, E-mail: Li_Jiguang@iapcm.ac.cn. PLASMA DIAGNOSTIC POTENTIAL OF 2p4f IN N{sup +}—ACCURATE WAVELENGTHS AND OSCILLATOR STRENGTHS. United States: N. p., 2015. Web. doi:10.1088/0004-637X/801/2/129.
Shen, Xiaozhi, Li, Jiguang, Wang, Jianguo, & Jönsson, Per, E-mail: Li_Jiguang@iapcm.ac.cn. PLASMA DIAGNOSTIC POTENTIAL OF 2p4f IN N{sup +}—ACCURATE WAVELENGTHS AND OSCILLATOR STRENGTHS. United States. doi:10.1088/0004-637X/801/2/129.
Shen, Xiaozhi, Li, Jiguang, Wang, Jianguo, and Jönsson, Per, E-mail: Li_Jiguang@iapcm.ac.cn. Tue . "PLASMA DIAGNOSTIC POTENTIAL OF 2p4f IN N{sup +}—ACCURATE WAVELENGTHS AND OSCILLATOR STRENGTHS". United States. doi:10.1088/0004-637X/801/2/129.
@article{osti_22521379,
title = {PLASMA DIAGNOSTIC POTENTIAL OF 2p4f IN N{sup +}—ACCURATE WAVELENGTHS AND OSCILLATOR STRENGTHS},
author = {Shen, Xiaozhi and Li, Jiguang and Wang, Jianguo and Jönsson, Per, E-mail: Li_Jiguang@iapcm.ac.cn},
abstractNote = {Radiative emission lines from nitrogen and its ions are often observed in nebula spectra, where the N{sup 2+} abundance can be inferred from lines of the 2p4f configuration. In addition, intensity ratios between lines of the 2p3p-2p3s and 2p4f-2p3d transition arrays can serve as temperature diagnostics. To aid abundance determinations and plasma diagnostics, wavelengths and oscillator strengths were calculated with high precision for electric dipole (E1) transitions from levels in the 2p4f configuration of N{sup +}. Electron correlation and relativistic effects, including the Breit interaction, were systematically taken into account within the framework of the multiconfiguration Dirac-Hartree-Fock method. Except for the 2p4f-2p4d transitions with quite large wavelengths and the two-electron-one-photon 2p4f-2s2p {sup 3} transitions, the uncertainties of the present calculations were controlled to within 3% and 5% for wavelengths and oscillator strengths, respectively. We also compared our results with other theoretical and experimental values when available. Discrepancies were found between our calculations and previous calculations due to the neglect of relativistic effects in the latter.},
doi = {10.1088/0004-637X/801/2/129},
journal = {Astrophysical Journal},
number = 2,
volume = 801,
place = {United States},
year = {Tue Mar 10 00:00:00 EDT 2015},
month = {Tue Mar 10 00:00:00 EDT 2015}
}