Energy levels and spectral lines of Ne viii- Eur. Phys. J. D 39, 173–188 2006 Report as inadecuate

Energy levels and spectral lines of Ne viii- Eur. Phys. J. D 39, 173–188 2006 - Download this document for free, or read online. Document in PDF available to download.

The European Physical Journal D

, Volume 47, Issue 3, pp 325–325

First Online: 04 April 2008Received: 08 February 2008


Kramida and Buchet-Poulizac Eur. Phys. J. D 39, 173 2006 provide a comprehensive compilation of Ne VIII energy levels and spectral lines. We are concerned about the data of one line treated in the second paragraph of Section 2, the line at 77.0 nm. This line is very important for solar physics investigations as it is a bright line emitted in the lower corona of the Sun, where mass flux and energy transport determine the properties of the nascent solar wind. Consequently, it has been studied in a number of investigations, of which we want to mention two. The results are published by Peter and Judge Astrophys. J. 522, 1148 1999 and Dammasch et al. Astron. Astrophys. 346, 285 1999. Both these studies concluded that the rest wavelength of the Ne VIII line in question is 77.0428 nm with standard uncertainties of 0.7 pm and 0.3 pm, respectively. Dammasch et al. discussed, in particular, the uncertainty level of 0.5 pm stated by Bockasten et al. Proc. Phys. Soc. 81, 522 1963. The conclusion was that it is far too optimistic and not reliable. So, we take issue with the statement of the authors that the Bockasten et al. measurements of this line are the most accurate in the literature.If the Bockasten et al. value 77.0409 nm ± 0.0005 nm Proc. Phys. Soc. 81, 522 1963 for the rest wavelength of this line were true, it would imply downward movements in the solar corona that are in conflict with the measurements in other lines.

PACS.32.10.Fn Fine and hyperfine structure 32.10.Hq Ionization potentials, electron affinities 32.30.Jc Visible and ultraviolet spectra 95.30.Ky Atomic and molecular data, spectra, and spectral parameters opacities, rotation constants, line identification, oscillator strengths, gf values, transition probabilities, etc.  Download to read the full article text

Author: K. Wilhelm - W. Curdt - I. E. Dammasch - D. M. Hassler



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