The forbidden transitions within 3s 2 3p 5 3d of Fe ix and Ni xi and 3s 2 3p 4 3d of Fe x and Ni xii
Abstract
Improved level values for 3s2 3p5 3d and 3s2 3p4 3d of Fe IX and Fe X are derived from the observed forbidden lines with special regard to recent accurate measurements in the vacuum-ultraviolet part of the coronal spectrum. A procedure for estimating expected relative intensities is proposed and used for an additional check on the consistency of the identifications, which now comprise 12 lines of Fe IX and 11 lines of Fe X. Finally, by use of a suitable extrapolation technique the wavelengths of corresponding lines in nickel are predicted, which leads to some new identifications and a total of 6 identified lines of Ni XI and 4 of Ni XII.
- Publication:
-
Solar Physics
- Pub Date:
- April 1978
- DOI:
- 10.1007/BF00160106
- Bibcode:
- 1978SoPh...57..329E
- Keywords:
-
- Forbidden Transitions;
- Iron;
- Nickel;
- Solar Corona;
- Solar Spectra;
- Ultraviolet Spectra;
- Extrapolation;
- Far Ultraviolet Radiation;
- Line Spectra;
- Tables (Data);
- Solar Physics;
- Nickel;
- Relative Intensity;
- Special Regard;
- Additional Check;
- Extrapolation Technique;
- Forbidden Lines:Solar Corona;
- Solar Corona: Line Identifications