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Atoms 2017, 5(4), 37; doi:10.3390/atoms5040037

Discrepancies in Atomic Data and Suggestions for Their Resolutions

Astrophysics Research Centre, School of Mathematics and Physics, Queen’s University Belfast,Belfast BT7 1NN, Northern Ireland, UK
Received: 16 February 2017 / Revised: 21 September 2017 / Accepted: 27 September 2017 / Published: 9 October 2017
(This article belongs to the Section Atomic, Molecular and Nuclear Spectroscopy and Collisions)
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Abstract

The analysis and modelling of a range of plasmas (for example, astrophysical, laser- produced and fusion) require atomic data for a number of parameters, such as energy levels, radiative rates and electron impact excitation rates, or equivalently, the effective collision strengths. Such data are desired for a wide range of elements and their many ions, although all elements are not useful for all types of plasmas. Since measurements of atomic data are mostly confined to only a few energy levels of some ions, calculations for all parameters are highly important. However, often, there are large discrepancies among different calculations for almost all parameters, which makes it difficult to apply the data with confidence. Many such discrepancies (and the possible remedies) were discussed earlier (Fusion Sci. Technol. 2013, 63, 363). Since then, many more anomalies for almost all of these atomic parameters have been noticed. Therefore, this paper is a revisit of various atomic parameters to highlight the large discrepancies, their possible sources and some suggestions to avoid these, so that comparatively more accurate and reliable atomic data may be available in the future. View Full-Text
Keywords: energy levels; radiative rates; lifetimes; collision strengths; effective collision strengths; accuracy assessments energy levels; radiative rates; lifetimes; collision strengths; effective collision strengths; accuracy assessments
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Aggarwal, K.M. Discrepancies in Atomic Data and Suggestions for Their Resolutions. Atoms 2017, 5, 37.

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