We have used an electron beam ion trap to measure electron-density-diagnostic line-intensity ratios for extreme ultraviolet lines from Fe XII, XIII, and XIV at wavelengths of 185-205 and 255-276 Angstrom. These ratios can be used as density diagnostics for astrophysical spectra and are especially relevant to solar physics. We have compared our results to atomic calculations using the Flexible Atomic Code and identified some lines that are reliable and others where there are discrepancies between experiments and theory.
American Astronomical Society Meeting Abstracts #234
- Pub Date:
- June 2019