Fe L-shell Excitation Cross Section Measurements on EBIT-I

Details Fe L-shell Excitation Cross Section Measurements on EBIT-I Fe L-shell Excitation Cross Section Measurements on EBIT-I

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006head....9.1357c&link_type=abstract

American Astronomical Society, HEAD meeting #9, #13.57; Bulletin of the American Astronomical Society, Vol. 38, p.375

Astronomy and Astrophysics

Astronomy

Scientific paper

We report the measurement of electron impact excitation cross sections for the strong iron L-shell 3-2 lines of Fe XVII to Fe XXIV at the LLNL EBIT-I electron beam ion trap using a crystal spectrometer and NASA-Goddard Space Flight Center's 6x6 pixel array microcalorimeter. The cross sections were determined by direct normalization to the well-established cross sections for radiative electron capture. Our results include the excitation cross section for over 50 lines at multiple electron energies. Although we have found that for 3C line in Fe XVII the measured cross sections differ significantly from theory, in most cases the measurements and theory agree within 20%.
This work was performed under the auspices of the U.S. DOE by LLNL under contract No. W-7405-Eng-48 and supported by NASA APRA grants to LLNL, GSFC, and Stanford University.

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