Electron Impact Excitation Cross Section Measurement for n = 3 to n = 2 Line Emission in Fe17+ to Fe23+

Details Electron Impact Excitation Cross Section Measurement for n = 3 to n = 2 Line Emission in Fe17+ to Fe23+ Electron Impact Excitation Cross Section Measurement for n = 3 to n = 2 Line Emission in Fe17+ to Fe23+

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006apj...646..653c&link_type=abstract

The Astrophysical Journal, Volume 646, Issue 1, pp. 653-665.

Astronomy and Astrophysics

Astronomy

7

Atomic Data, Atomic Processes, X-Rays: General

Scientific paper

We report the measurement of electron impact excitation cross sections for the strong iron L-shell 3-->2 lines of Fe XVIII through Fe XXIV at the EBIT-I electron beam ion trap using a crystal spectrometer and a 6×6 pixel array microcalorimeter. The cross sections were determined by direct normalization to the well established theoretical cross section of radiative electron capture through a sophisticated model analysis, which results in the excitation cross section for 48 lines at multiple electron energies. We also studied the electron-density-dependent nature of the emission lines, which is demonstrated by the effective excitation cross section of the 3d-->2p transition in Fe XXI.

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