Experimental and Theoretical Evaluation of Density-sensitive N VI, Ar XIV, and Fe XXII Line Ratios

Details Experimental and Theoretical Evaluation of Density-sensitive N VI, Ar XIV, and Fe XXII Line Ratios Experimental and Theoretical Evaluation of Density-sensitive N VI, Ar XIV, and Fe XXII Line Ratios

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...611..598c&link_type=abstract

The Astrophysical Journal, Volume 611, Issue 1, pp. 598-604.

Astronomy and Astrophysics

Astronomy

14

Atomic Data, Methods: Laboratory, Sun: Corona, Techniques: Spectroscopic, X-Rays: General

Scientific paper

The line ratios of the 2p-3d transitions in the boron-like spectra Ar XIV and Fe XXII have been measured using the electron beam ion traps at Lawrence Livermore National Laboratory. Radiative-collisional model calculations show these line ratios to be sensitive to the electron density in the ranges ne=1010-1012 cm-3 and ne=1013-1015 cm-3, respectively. In our experiment, the electron beam density of about 1011 cm-3 was varied by about a factor of 5. Our data show a density effect for the line doublet in Ar XIV, and good agreement with theory is found. The relative intensity of the Fe XXII doublet shows good agreement with our predicted low-density limit. The N VI K-shell spectrum was used to infer the actual electron density in the overlap region of ion cloud and electron beam, and systematic measurements and calculations of this spectrum are presented as well. The Ar XIV and Fe XXII spectra promise to be reliable density diagnostics for stellar coronae, complementing the K-shell diagnostics of helium-like ions.

Affiliated with

Also associated with

No associations

Rating

Experimental and Theoretical Evaluation of Density-sensitive N VI, Ar XIV, and Fe XXII Line Ratios does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Experimental and Theoretical Evaluation of Density-sensitive N VI, Ar XIV, and Fe XXII Line Ratios, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Experimental and Theoretical Evaluation of Density-sensitive N VI, Ar XIV, and Fe XXII Line Ratios will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1857819