  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. Tech. 2013, 63, 363).
Since then a lot more anomalies for almost all of these atomic parameters have
come to notice. Therefore, this paper is a revisit of various atomic parameters
to highlight the large discrepancies, their possible sources and some
suggestions to avoid those, so that comparatively more accurate and reliable
atomic data may be available in the future.
