View : 12 Download: 0

Ionization balance for Ti and Cr ions: Effects of uncertainty in dielectronic recombination rate

Title
Ionization balance for Ti and Cr ions: Effects of uncertainty in dielectronic recombination rate
Authors
Seon K.-I.Nam U.-W.Park I.H.
Ewha Authors
박일흥
Issue Date
2003
Journal Title
Journal of Physics B: Atomic, Molecular and Optical Physics
ISSN
0953-4075JCR Link
Citation
vol. 36, no. 12, pp. 2679 - 2694
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The available electron-impact ionization cross sections for Ti and Cr ions are reviewed, and calculations of the ionization balance for the ions under coronal equilibrium are presented. The calculated ionic abundance fractions are compared with those of previous works. The effects of modelling uncertainty in dielectronic recombination on isoelectronic line ratios, which are formed using the same spectral line from two elements of slightly different atomic numbers, are discussed concentrating on high temperature ranges. Also discussed are the effects of modelling uncertainty on inter-ionization stage line ratios formed from adjacent ionization stages. It is demonstrated that the modelling uncertainty in dielectronic recombination tends to cancel out only when the isoelectronic line ratio of He-like ions is considered, and that the sensitivity of the isoelectronic line ratios to the modelling uncertainty tends to increase for less ionized stages. It is also found that the interstage line ratios are less sensitive to the typical ∼20% uncertainties of dielectronic rates than the isoelectronic line ratios, and that the interstage line ratio of He- to Li-like ions in Ti and Cr plasmas is a better choice for a temperature diagnostic in the temperature ranges from ∼0.6 to ∼1.5 keV in which Li-like ions have maximum ionic abundances.
DOI
10.1088/0953-4075/36/12/322
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE