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Title: Electron impact collision strengths in Ne VII

Abstract

The lines of Ne VII have been observed in many astronomical objects, and some transitions from high energy levels were observed both in Seyfert galaxies and stellar coronae. Thus, the atomic data for these transitions are important for modeling. Using the code FAC we calculated the collision strengths based on the distorted-wave method with large configuration interactions included. The Maxwellian averaged effective collision strengths covering the typical temperature range of astronomical and laboratory hot plasmas are presented. We extend the calculation of the energy levels to n=4 and 5. The energy levels, wavelengths, spontaneous transition rates, weighted oscillator strengths, and effective collision strengths were reported. Compared with the results from experiment or previous theoretical calculations a general agreement is found. It is found that the resonance effects are important in calculating the effective collision strengths.

Authors:
; ;
Publication Date:
OSTI Identifier:
22192310
Resource Type:
Journal Article
Journal Name:
Atomic Data and Nuclear Data Tables
Additional Journal Information:
Journal Volume: 98; Journal Issue: 4; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0092-640X
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; CONFIGURATION INTERACTION; DISTORTED WAVE THEORY; ELECTRONS; ENERGY LEVELS; ENERGY-LEVEL TRANSITIONS; F CODES; HOT PLASMA; ION COLLISIONS; MULTICHARGED IONS; NEON IONS; OSCILLATOR STRENGTHS; RESONANCE; SEYFERT GALAXIES; STELLAR CORONAE

Citation Formats

Di, L., Shi, J.R., and Zhao, G., E-mail: gzhao@bao.ac.cn. Electron impact collision strengths in Ne VII. United States: N. p., 2012. Web. doi:10.1016/J.ADT.2012.02.001.
Di, L., Shi, J.R., & Zhao, G., E-mail: gzhao@bao.ac.cn. Electron impact collision strengths in Ne VII. United States. doi:10.1016/J.ADT.2012.02.001.
Di, L., Shi, J.R., and Zhao, G., E-mail: gzhao@bao.ac.cn. Sun . "Electron impact collision strengths in Ne VII". United States. doi:10.1016/J.ADT.2012.02.001.
@article{osti_22192310,
title = {Electron impact collision strengths in Ne VII},
author = {Di, L. and Shi, J.R. and Zhao, G., E-mail: gzhao@bao.ac.cn},
abstractNote = {The lines of Ne VII have been observed in many astronomical objects, and some transitions from high energy levels were observed both in Seyfert galaxies and stellar coronae. Thus, the atomic data for these transitions are important for modeling. Using the code FAC we calculated the collision strengths based on the distorted-wave method with large configuration interactions included. The Maxwellian averaged effective collision strengths covering the typical temperature range of astronomical and laboratory hot plasmas are presented. We extend the calculation of the energy levels to n=4 and 5. The energy levels, wavelengths, spontaneous transition rates, weighted oscillator strengths, and effective collision strengths were reported. Compared with the results from experiment or previous theoretical calculations a general agreement is found. It is found that the resonance effects are important in calculating the effective collision strengths.},
doi = {10.1016/J.ADT.2012.02.001},
journal = {Atomic Data and Nuclear Data Tables},
issn = {0092-640X},
number = 4,
volume = 98,
place = {United States},
year = {2012},
month = {7}
}